( 1) 94 × 8 = (2) 57 × 6 = (3) 9 × 67 =

(4) 26 × 9 = (5) 4 1 × 9 = (6) 57 × 3 =

(7) 7 × 79 = (8) 62 × 5 = (9) 2 1 × 1 =

( 10) 3 × 57 = ( 1 1) 5 × 84 = ( 12) 8 × 26 =

( 13) 5 × 67 = ( 14) 37 × 4 = ( 15) 8 × 98 =

( 16) 6 × 24 = ( 17) 98 × 5 = ( 18) 12 × 2 =

( 19) 9 × 75 = (20) 68 × 2 =

In the fourth grade, a number is hundreds of times.

( 1) 4 × 30 = (2) 100 × 4 = (3) 700 × 5 =

(4) 9 × 800 = (5) 8 × 80 = (6) 5 × 200 =

(7) 6 × 300 = (8) 2 × 600 = (9) 300 × 9 =

( 10) 2 × 400 = ( 1 1) 4 × 50 = ( 12) 3 × 20 =

( 13) 60 × 1 = ( 14) 7 × 600 = ( 15) 5 × 90 =

( 16) 20 × 1 = ( 17) 90 × 3 = ( 18) 9 × 300 =

( 19) 2 × 100 = (20) 90 × 6 =

Addition and subtraction of decimals in the fourth grade

( 1) 7.64 + 6.42 = (2) 9.3 1 + 3.3 1 = (3) 1.44 + 1.02 =

(4) 3.42 - 2. 19 = (5) 8. 13 - 7.79 = (6) 8.96 - 5.27 =

(7) 7.37 + 6. 17 = (8) 3.77 - 3.00 = (9) 2. 10 + 2.34 =

( 10) 1.48 + 4.54 = ( 1 1) 7.69 + 9.3 1 = ( 12) 7.83 + 1.96 =

( 13) 7.45 - 5.77 = ( 14) 8.98 - 7.83 = ( 15) 3.08 + 9.0 1 =

( 16) 9. 17 + 4.62 = ( 17) 3.79 + 3.20 = ( 18) 9.5 1 - 8.59 =

( 19) 5.64 - 2.98 = (20) 9.86 - 8.20 =

Four-year-old two-digit times three-digit

( 1) 624 × 17 = (2) 15 × 9 14 = (3) 422 × 74 =

(4) 894 × 45 = (5) 103 × 80 = (6) 445 × 32 =

(7) 49 × 958 = (8) 2 12 × 25 = (9) 2 1 × 498 =

( 10) 80 × 857 = ( 1 1) 980 × 69 = ( 12) 37 1 × 16 =

( 13) 70 × 569 = ( 14) 53 × 223 = ( 15) 36 × 499 =

( 16) 5 16 × 47 = ( 17) 37 × 438 = ( 18) 840 × 78 =

( 19) 9 18 × 62 = (20) 946 × 80 =

Divide ten by ten in the fourth grade

( 1) 20 ÷ 10 = (2) 90 ÷ 10 = (3) 30 ÷ 10 =

(4) 60 ÷ 10 = (5) 90 ÷ 30 = (6) 60 ÷ 20 =

(7) 40 ÷ 10 = (8) 80 ÷ 20 = (9) 80 ÷ 10 =

( 10) 50 ÷ 10 = ( 1 1) 40 ÷ 20 = ( 12) 80 ÷ 40 =

( 13) 70 ÷ 10 = ( 14) 60 ÷ 30 =

Divide the whole ten of the fourth grade by 100, divide by 10.

( 1) 920 ÷ 10 = (2) 180 ÷ 90 = (3) 900 ÷ 20 =

(4) 420 ÷ 10 = (5) 540 ÷ 30 = (6) 390 ÷ 30 =

(7) 520 ÷ 10 = (8) 330 ÷ 10 = (9) 840 ÷ 20 =

( 10) 330 ÷ 30 = ( 1 1) 100 ÷ 20 = ( 12) 160 ÷ 20 =

( 13) 270 ÷ 30 = ( 14) 5 10 ÷ 10 = ( 15) 700 ÷ 10 =

( 16) 690 ÷ 30 = ( 17) 440 ÷ 40 = ( 18) 520 ÷ 40 =

( 19) 420 ÷ 70 = (20) 720 ÷ 10 =

Four-level integer ten divided by three-digit source

( 1) 940 ÷ 10 = (2) 560 ÷ 10 = (3) 100 ÷ 20 =

(4) 240 ÷ 80 = (5) 630 ÷ 10 = (6) 280 ÷ 70 =

(7) 400 ÷ 20 = (8) 370 ÷ 10 = (9) 550 ÷ 10 =

( 10) 880 ÷ 80 = ( 1 1) 740 ÷ 10 = ( 12) 300 ÷ 20 =

( 13) 360 ÷ 10 = ( 14) 600 ÷ 40 = ( 15) 900 ÷ 90 =

( 16) 760 ÷ 10 = ( 17) 180 ÷ 60 = ( 18) 900 ÷ 20 =

( 19) 400 ÷ 80 = (20) 800 ÷ 50 =

Divide two digits by three digits in the fourth grade.

[Label: Level 4]

( 1) 970 ÷ 97 = (2) 456 ÷ 24 = (3) 544 ÷ 17 =

(4) 484 ÷ 44 = (5) 730 ÷ 73 = (6) 924 ÷ 2 1 =

(7) 806 ÷ 62 = (8) 697 ÷ 4 1 = (9) 870 ÷ 87 =

( 10) 684 ÷ 57 = ( 1 1) 726 ÷ 66 = ( 12) 8 16 ÷ 68 =

( 13) 920 ÷ 92 = ( 14) 830 ÷ 83 = ( 15) 885 ÷ 59 =

( 16) 846 ÷ 47 = ( 17) 868 ÷ 28 = ( 18) 780 ÷ 12 =

( 19) 847 ÷ 77 = (20) 450 ÷ 30 =

The fourth grade decimal reservation quick calculation problem.

(1) 0.448 (with two decimal places) (2) 0.84 1 (with two decimal places) (3) 5.40 1 (with one decimal place)

(4) 86.348 (with two decimal places reserved) (5) 2. 104 (with one decimal place reserved) (6) 36.654 (with two decimal places reserved)

(7) 3. 126 (with two decimal places reserved) (8) 5.222 (with two decimal places reserved) (9) 20. 1 16 (with two decimal places reserved)

(10) 4. 104 (keep two decimal places) (1 1) 8.63 (keep two decimal places) (12) 2.872 (keep two decimal places).

(13) 13. 196 (with two decimal places reserved) (14)157.177 (with integer reserved) (15) 0.

(16) 18.267 (with two decimal places) (17) 4.5 (with two decimal places) (18) 6. 134 (with one decimal place)

(19) 0.284 (with two decimal places reserved) (20) 2.728 (with two decimal places reserved)

Addition and subtraction of decimals in the fourth grade

( 1) 34.85 - 1 1.73 = (2) 75.80 + 59.35 = (3) 64.39 + 40.78 =

(4) 67.23 - 19. 17 = (5) 50. 10 - 48.60 = (6) 9 1.9 1 - 75. 10 =

(7) 53.73 - 3 1.75 = (8) 64.48 - 14.42 = (9) 39.03 - 14.98 =

( 10) 22.04 + 80. 13 = ( 1 1) 28.36 - 24.00 = ( 12) 6 1.83 + 69.95 =

( 13) 65.36 - 38.06 = ( 14) 29.37 - 18.02 = ( 15) 42.09 - 32.46 =

( 16) 18.08 + 34.00 = ( 17) 47.63 - 3 1.59 = ( 18) 17.42 - 10.44 =

( 19) 16.24 - 14. 18 = (20) 55.89 - 28.75 =

Four operations of two-digit numbers in grade four

1) 49+76+37 = (2) 28×2+84 = (3) 4÷ 1× 1 = (4) 36+69×4 = (5) 9÷ 1-8 =

(6) 4× 1÷ 1 = (7) 6÷3+ 19 = (8) 5×7÷ 1 = (9) 8+52÷ 1 = ( 10) 2+50÷ 1 =

( 1 1) 9÷ 1+53 = ( 12) 9÷ 1×4 = ( 13) 17×8× 1 = ( 14) 94-26-22 = ( 15) 6÷ 1-3 =

( 16) 48+84× 1 = ( 17) 7× 1÷ 1 = ( 18) 7÷7×4 = ( 19) 7÷ 1×5 = (20) 4÷ 1×2 =

Annoying fourth-grade oral arithmetic problems

970,000-265,438+00,000 = 400×80= 720×53≈ 72+58=

60×500= 9000-2000= 56×620≈ 17×7=

560,000+200,000 = 4× 15= 578×27≈ 200-75=

4000+3000= 40× 15= 342×28≈ 125×2=

700,000+260,000 = 400× 15= 786×34≈ 480+80=

8000- 1000= 25×4= 55×240≈ 377+23=

3000+2000= 25×30= 2 14×52≈ 99+ 102=

180,000+350,000 = 25×300= 496×89≈ 330-260=

5000+4000= 8×6= 68×3 15≈ 9×6+ 15=

470,000+230,000 = 80×60= 778×43≈ 8×9+7=

9000-6000= 800×600= 87× 1 15≈ 7×5+5=

8000-2000= 400+80= 806×5 1≈ 5×8+9=

760,000 to 280,000 = 277+23 = 400-128 =120-25 =

900,000-300,000 = 480-400= 300-253= 107-79=

23×30= 300-23= 200- 149= 280÷8=

230×30= 99+88= 100-56= 35×4=

200×20= 330-260= 600-420= 38×5=

320×30= 187-99= 95+ 105= 277+23=

240×20= 330-70= 4000+5000= 1500+6000=

480-80= 70×600= 100-78= 6×9+8=

260+70= 600×5= 1200-800= 7+8×9=

300-277= 130×4= 6000+9000= 187-88=

187-88= 400×7= 2 10-55= 75×6=

500- 149= 800÷2= 185-30= 75×4=

400- 127= 450÷5= 358+642= 1200-400=

Extracurricular problem sets for the fourth grade.

15×5= 16×5= 23×3= 12×50= 27×3=

48÷4= 90÷ 15= 24×20= 32×3= 48÷ 16=

12×8= 27×3= 56÷ 14= 76-39= 605+59=

24÷8= 14×2= 83-45= 96÷24= 40÷20= 40×30=

30×23= 12×8= 27+32= 48+27= 4500×20=

120×600= 280+270= 200×360= 4×250= 3 10-70= 400× 14=

470+ 180= 60×600= 20×420= 290×300= 680+270= 6× 1300=

1300×50= 200×48= 930-660= 530+280= 180×500= 200× 160=

300×33= 3× 1400= 60÷ 12= 140×300= 750-290= 5×400=

370×200= 65÷ 13= 15× 10= 84÷2 1=

100-54= 123+ 15= 12× 1 1= 160×30= 220×40= 104×5=

120×2= 90÷30= 270×30= 360÷4= 55÷5= 32×6=

35×2= 140×7= 13×6= 280×3= 350×2= 50× 1 1=

250×6= 7200+900= 4 10-20 1= 125×8= 48×20=

390+ 140= 1 1×80= 24×50= 530-70=

420-90= 7×700= 203+98= 370+580=

240×3= 24×30= 240×30= 360×5= 180× 15=

45×7×2= 8×5×25= 35×2×5= 4×9×50= 160÷8÷2=

6 liters = () ml 8000 ml = () liters

20000ml = () L10L = () mL.

40÷20= 80÷40= 60÷30=

90÷30= 240÷80= 480÷80=

400÷50= 320÷40= 2 10÷30=

60÷20= 200÷50= 360÷40=

6 1÷20≈ 203÷50≈ 358÷40≈

60÷ 19≈ 200÷52≈ 360÷37≈

30×3= 80×9= 60×5=

90÷30= 720÷80= 300÷60=

19×96-962÷74 10000-(59+66)×64 5940÷45×(798-6 16)

(3 15×40-364)÷7 12520÷8×( 12 1÷ 1 1) (20 10-906)×(65+ 15)

(639-7 1×9)÷ 167 ( 10800-800×4)÷4 720÷90×48÷8

36×(9 13-276÷23) (93+25×2 1)×9 507÷ 13×63+498

723-(52 1+504)÷25 384÷ 12+23×37 1 (39-2 1)×(396÷6)

720÷( 15-3×2) 3889-( 108-93 1)×5 (800+200÷50)×3

Oral arithmetic problems suitable for fourth grade children

39×4= 5 1×9= 77×7= 874×3=

304×5= 106× 10= 178×3= 78×9=

1.573×6= 3.52× 100 3.54×8= 43.87×4=

163×3= 724×7= 43.7×8= 46.9×8=

78×9= 250×0.4= 24×5= 37×8=

104×5= 847×4= 8×42= 5.78×92=

78×2= 245×0= 306× 103×0= 132×6=

350× 1000= 3 17×4= 1.52×6= 125×0.8=

302×783×0= 264×8= 5.76×9= 3875×0=

1.854×0× 100= 937×4= 285×4= 134×3=

125×8= 25×4= 300×52= 5×42=

1.35×9= 15×8= 125×4= 8.456× 1000=

2 1×8= 32×0. 1= 572×8= 372×0=

153×46= 173× 10= 15×80= 3652007×0=

384÷4= 888÷74 592÷37= 384÷32=

1846÷ 10= 468÷39= 1460÷20= 50÷2=

78÷4= 24.5÷ 14= 49.5÷3= 153÷0=

462÷5= 374÷ 10= 73÷9= 10÷3=

73×78≈ 90 1÷4≈ 35×2 1≈ 38÷6≈

Interesting problem of oral calculation in grade four

7365-3999= 1800÷36= 35× 14=

4×50 20×2 300×6 120×3

50×600 16×70 150×20 60÷30

80÷20 240÷40 2 10÷70 400÷50

1000÷ 100 25×4 125×8

1) 18×5= 2) 42÷7= 3) 38×2= 4) 36÷9=

5) 25×4= 6) 32+8= 7) 14×8= 8) 200×9=

9) 70×5= 10) 28×3= 1 1) 45÷5= 12) 200×9=

13) 13×3= 14) 24×4= 15) 13×5= 16) 19×3=

17) 16×4= 18) 12×8= 19) 270×3= 20) 56+8=

2 1) 19×4= 22) 34×3= 23) 1 1×7= 24) 15×4=

25) 32+8= 26) 24×4= 27) 70×5= 28) 18÷3=

29) 24×4= 30) 36÷9= 3 1) 40×4= 32) 500×5=

33) 90×5= 34) 45÷5= 35) 18×5= 36) 38×2=

37) 36×2= 38) 500×5= 39) 24÷3= 40) 12×8=

4 1) 75×2= 42) 1 1×4= 43) 16×5= 44) 12×9=

45) 18÷3= 46) 90×5= 47) 800×7= 48) 90×5=

49) 15×5= 50) 8 1÷9= 5 1) 50×7= 52) 14×7=

53) 50×7= 54) 32×4= 55) 22×3= 56) 300×7=

57) 12×9= 58) 56+8= 59) 25×6= 60) 25×3=

6 1) 12×5= 62) 14×7= 63) 25×3= 64) 12×6=

65) 33×5= 66) 72+8= 67) 12×438×2= 68) 2 1×6=

69) 700×4= 70) 12×6= 7 1) 22×5= 72) 80×3=

73) 42÷7= 74) 25×6= 75) 1 1×6= 76) 14×8=

77) 28×3= 78) 40×4= 79) 20×9= 80) 1000×4=

8 1) 800×7= 82) 14×3= 83) 80×3= 84) 32×3=

85) 25×6= 86) 20×9= 87) 12×9= 88) 36÷9=

89) 30×7= 90) 36×2= 9 1) 8 1÷9= 92) 500×5=

93) 13×6= 94) 32×3= 95) 17×5= 96) 14×6=

97) 26×3= 98) 79+24= 99) 16×3= 100) 28×3=

Elementary school fourth grade oral arithmetic examination questions.

560÷35÷2= 25×4= 254+99=

45× 12= 750-570= 50÷7=

57+ 19= 60÷60= 70×60=

9 1-28= 58+79+42= 80×5×6=

90-25= 35×35+65×35= 125×80=

44- 15= 1800÷90= 125× 16=

97+ 18= 10×24= 45× 14=

26+ 14= 8 1÷27= 69÷23=

123+259+74 1+477= 95×46+46×5= 102×34=

749+5036+25 1= 99×99+99= 6 14-402=

725-76-24= 125×24= 360÷24=

1036- 155-245= 865×99+865= 67×9+67=

655+777+345= 25×9×4×7= 18 14-378-422=

398+558+442= 1800÷5÷2= 22×6×5=

870-232- 168= 640÷ 16= 7200÷45÷2=

A set of oral arithmetic problems in grade four

32×30= 22×30= 6×20 1=

17×5= 4×60= 4500÷900=

170+90= 4800÷40= 14×20 1=

80÷ 16= 4200÷20= 2500÷50=

16×5= 32×20= 67×4=

2400÷40= 3600÷60= 87÷3=

25× 16= 48×9= 696÷3=

125×6= 48×25= 780÷20=

72-45= 360-85= 720÷45÷2=

3000+200= 48× 125= 35×8=

80-4= 420÷35÷2= 25×32=

45÷ 15= 78÷2= 45× 12=

6×85= 69÷23= 67+25=

7 10-420= 50×90= 22×8×5=

12×5= 6300÷30= 690-420=

102+284= 480+290= 930÷30=

23×3= 800×30= 2 100÷70=

Fourth grade oral arithmetic mental arithmetic examination questions

640÷80=

15× 10=

12× 1 1=

160×30=

220×40=

104×5=

4500÷50=

120×2=

90÷30=

270÷30=

270×30=

84÷2 1=

76÷9=

66÷7=

100-54=

123+ 15=

360÷4=

55÷5=

32×6= 7000÷70=

200÷40=

180÷30=

240÷40=

35×2=

140×7=

13×6=

280×3=

350×2=

50× 1 1=

250×6=

7200+900=

4 10-20 1=

125×8=

48×20=

6600÷600=

390+ 140=

1 1×80=

24×50=

3600÷400= 4000÷50=

530-70=

420-90=

9600÷30=

7×700=

203+98=

1800÷300=

240+570=

4800÷400=

370+580=

580-490=

9 10-370=

25×8=

270- 190=

36×2=

75÷25=

330÷ 1 1=

6×800=

5400÷9=

420÷60= 9×800=

3×330=

300×7=

9×500=

390÷ 13=

6300÷700=

5600÷700=

4800÷ 12=

3500÷7=

370+560=

520+490=

450-90=

80+330=

70×700=

7000÷70=

4000÷80=

2400÷200=

420-90=

170+320=

1000-5 1=

520-260=

9 10- 190=

35×200=

22×200=

8800÷400=

9300÷300=

6×300=

1800÷200=

Fourth grade oral arithmetic training questions

640÷80=

15×5=

23×3=

12×2×5=

480÷80=

16×5=

27×3=

90÷ 15=

48÷4=

640÷ 16=

39÷3=

24×20=

32×3=

48÷ 16=

12×8=

27×3=

56÷ 14=

24÷8=

14×2=

83-45=

560÷80=

96÷24=

40÷20=

40×30=

37+26=

76-39=

605+59=

30×23=

12×8=

27+32=

48+27=

4500×20=

73+ 15 =

120×600 =

200×360=

6800×400=

280+270=

4×2500=

6000÷40=

5× 1280=

3 10-70=

400× 14=

470+ 180=

1000÷25=

160×600=

20×420=

290×300=

8 100÷300=

7600÷200=

7600÷400=

680+270=

980÷ 14=

4200÷30=

6× 1300=

1300×50=

200×48=

930-660=

530+280=

9200÷400=

840÷2 1=

180×500=

8000÷500 =

1900÷20=

200× 160=

8700÷300=

300×330=

3× 1400=

7000÷ 14=

600÷ 12=

9600÷80=

140×300=

8800÷40=

9600÷800=

750-290=

5×490=

760×20=

7500÷500=

370×200=

650÷ 13=

8600-4200=

240×4