Current location - Training Enrollment Network - Mathematics courses - Require 500 crossings in the second grade of primary school to calculate problems, simply add, subtract, multiply and divide instead of add and subtract.
Require 500 crossings in the second grade of primary school to calculate problems, simply add, subtract, multiply and divide instead of add and subtract.
7×40= 100-63= 3.2+ 1.68= 2.8×0.4=

14-7.4= 1.92÷0.04= 0.32×500= 0.65+4.35=

10-5.4= 4÷20= 3.5×200= 1.5-0.06=

0.75÷ 15= 0.4×0.8= 4×0.25= 0.36+ 1.54=

1.0 1×99= 420÷35= 25× 12= 135÷0.5=

3/4 + 1/4 = 2 + 4/9 = 3 - 2/3 = 3/4 - 1/2=

1/6 + 1/2 - 1/6 = 7.5-(2.5+3.8)= 7/8 + 3/8 =

3/ 10 + 1/5 = 4/5 - 7/ 10 = 2 - 1/6 - 1/3 =

0.5 1÷ 17= 32.8+ 19= 5.2÷ 1.3= 1.6×0.4=

4.9×0.7= 1÷5= 6÷ 12= 0.87-0.49=

70÷7= 20× 10= 320÷5≈ 54×70≈ 25 1÷4≈ 6300÷7=

13 1÷4≈ 50×8= 85-45= 0÷5= 280÷4= 60×40=

840-30= 2700÷9= 99×3 1≈ 3. 1+2.7= 13 1÷4≈ 50×8=

7.8- 1.8= 350÷5= 630÷9= 13 1÷6≈ 10×80= 65-56=

43 1÷6≈ 15×6= 4.8-0.4= 6. 1+0.7= 9 1× 18≈ 257÷4≈

44÷4= 20×40= 2 10-30= 34+28 = 63- 63÷9= 120÷3×

800÷8= 40×70= 300÷4≈ 59×72≈ 25 1÷5≈ 630÷7=

13 1÷6≈ 0× 108= 45- 18= 0÷ 15= 120÷4= 30×40=

640-70= 1800÷9= 99×39≈ 5. 1+2.6= 4 1 1÷4≈ 15×20=

7.3- 1.8= 250÷5= 6300÷9= 43 1÷6≈ 20×80= 78-56=

49 1÷8≈ 14×6= 4.8-4.4= 6. 1+4.7= 9 1× 19≈ 367÷4≈

55÷5= 10×40= 2 1 1-30= 134+28 = 50×40- 100= 12×20÷

270÷9= 20× 1 1= 120÷5≈ 44× 17≈ 35 1÷4≈ 420÷7=

23 1÷4≈ 50×80= 73-45= 0÷25= 1600÷4= 20×40=

840-32= 540÷9= 89×3 1≈ 0. 1+0.8= 37 1÷4≈ 0×28=

8.3- 1.8= 2000÷5= 180÷9= 13 1÷6≈ 40×80= 85-5 1=

53 1÷6≈ 10×60-= 4.5-4.5= 6.8+0.2= 4 1× 19≈ 250÷4≈

270÷3= 1 1×50= 2 10-30= 68+28 = 25+25×2= 30÷3× 10=

100÷ 1= 30×70= 100÷5≈ 19×72≈ 25 1÷6≈ 140÷7=

234÷6≈ 120×0= 445- 15= 0÷85= 200÷4= 300×40=

740-70= 2700÷9= 9 1×33≈ 4. 1+2.4= 4 19÷4≈ 14×20=

7.8- 1.8= 1000÷5= 360÷9= 338÷6≈ 100×80= 98-56=

49 1÷8≈ 14×6= 4. 1-3. 1= 6.8+0.7= 1 1× 19≈ 167÷4≈

150÷5= 10×40= 100-30= 96+28 = 5 1+45-28= 10×20+34=

70÷7= 20× 10= 3200÷5≈ 54×70≈ 25 1÷4≈ 6300÷7=

13 1÷4≈ 50×8= 85-45= 0÷5= 280÷4= 60×40=

840-30= 2700÷9= 99×3 1≈ 3. 1+2.7= 13 1÷4≈ 50×8=

7.8- 1.8= 350÷5= 630÷9= 13 1÷6≈ 10×80= 65-56=

43 1÷6≈ 15×6= 4.8-0.4= 6. 1+0.7= 9 1× 18≈ 257÷4≈

44÷4= 20×40= 2 10-30= 34+28 = 63- 63÷9= 120÷3×20

800÷8= 40×70= 300÷5≈ 59×72≈ 25 1÷5≈ 630÷7=

13 1÷6≈ 0× 108= 45- 18= 0÷ 15= 120÷4= 30×40=

640-70= 1800÷9= 99×39≈ 5. 1+2.6= 4 1 1÷4≈ 15×20=

7.3- 1.8= 250÷5= 6300÷9= 43 1÷6≈ 20×80= 78-56=

49 1÷8≈ 14×6= 4.8-4.4= 6. 1+4.7= 9 1× 19≈ 367÷4≈

55÷5= 10×40= 2 1 1-30= 134+28 = 50×40- 100= 12×20÷3=

17×40= 100-63= 3.2+ 1.68= 2.8×0.4=

14-7.4= 1.92÷0.04= 0.32×500= 0.65+4.35=

10-5.4= 4÷20= 3.5×200= 1.5-0.06=

0.75÷ 15= 0.4×0.8= 4×0.25= 0.36+ 1.54=

1.0 1×99= 420÷35= 25× 12= 135÷0.5=

3/4 + 1/4 = 2 + 4/9 = 3 - 2/3 = 3/4 - 1/2=

1/6 + 1/2 - 1/6 = 7.5-(2.5+3.8)= 7/8 + 3/8 =

3/ 10 + 1/5 = 4/5 - 7/ 10 = 2 - 1/6 - 1/3 =

0.5 1÷ 17= 32.8+ 19= 5.2÷ 1.3= 1.6×0.4=

4.9×0.7= 1÷5= 6÷ 12= 0.87-0.49= 7×40= 100-63= 3.2+ 1.68= 2.8×0.4=

14-7.4= 1.92÷0.04= 0.32×500= 0.65+4.35=

10-5.4= 4÷20= 3.5×200= 1.5-0.06=

0.75÷ 15= 0.4×0.8= 4×0.25= 0.36+ 1.54=

1.0 1×99= 420÷35= 25× 12= 135÷0.5=

3/4 + 1/4 = 2 + 4/9 = 3 - 2/3 = 3/4 - 1/2=

1/6 + 1/2 - 1/6 = 7.5-(2.5+3.8)= 7/8 + 3/8 =

3/ 10 + 1/5 = 4/5 - 7/ 10 = 2 - 1/6 - 1/3 =

0.5 1÷ 17= 32.8+ 19= 5.2÷ 1.3= 1.6×0.4=

4.9×0.7= 1÷5= 6÷ 12= 0.87-0.49=

70÷7= 20× 10= 320÷5≈ 54×70≈ 25 1÷4≈ 6300÷7=

13 1÷4≈ 50×8= 85-45= 0÷5= 280÷4= 60×40=

840-30= 2700÷9= 99×3 1≈ 3. 1+2.7= 13 1÷4≈ 50×8=

7.8- 1.8= 350÷5= 630÷9= 13 1÷6≈ 10×80= 65-56=

43 1÷6≈ 15×6= 4.8-0.4= 6. 1+0.7= 9 1× 18≈ 257÷4≈

44÷4= 20×40= 2 10-30= 34+28 = 63- 63÷9= 120÷3× 125-34 383-25 650-47 253-42 3 10-85 720-56 250-80 432-45 63 1-42

138-95 500-350 450-62 198-95 320-63 139-39 42 1- 135 6 12-3 18 956- 135 325- 1 89 632-600 389 - 198 642- 135 738-625 398- 123 956- 183 1000-600 780-75 483- 154 535-429 625-75 3*0 5*0 6* 0 125* 3 32 1*4 245*3 432*7 285*8 528*4 125*8 193*3 3 19*4 425*3 2 17*7 7 12*8 237*2 52 1* 5 342* 5 195*7 239*7 7 12*8 237*2 52 1*5 342*5 195*7 234*8 523*47×40= 100-63= 3.2+ 1.68= 2.8×0.4=

14-7.4 =1.92÷ 0.04 = 0.32× 500 = 0.65+4.351-20 Question:

1.0 1×99= 420÷35= 25× 12= 135÷0.5=

12+39= 2978- 187= 15×4 1 = 55550÷ 1 1=

985+65= 7.52-3.02= 895-50+45= 0.5 1+ 17=

32.8+ 19= 5.2+ 1.3= 1.6+0.4= 4.9-0.7=

125÷5= 36 12÷ 12= 0.87-0.49= 707÷7=

2 1-40 questions:

20× 1 10= 320÷5= 54×70= 250÷4=

6300÷7= 13 1÷4= 50×8= 85-45=

0÷5= 280÷4= 60×40= 840-30=

2700÷9= 99×3 1= 3. 1+2.7= 13 1÷4=

50×8= 9.82- 1.8= 350÷5= 9630÷9=

4 1-60 questions:

234÷6= 120×0= 445- 15= 85850÷85=

200÷4= 300×40= 740-75= 2700÷9=

9 1×33= 4. 1+2.4= 4 19÷4= 14×20=

7.8- 1.8= 1000÷5= 360÷9= 336÷6=

100×80= 98-56= 49 1÷8= 14×6=

6 1-80 questions:

4. 1-3. 1= 6.8+0.7= 1 1× 19= 168÷4=

150÷5= 10×40= 100-37= 96+28 =

5 1+45-28= 10×20+34= 0.75+ 15= 0.4+0.8=

20×99= 420÷35= 25× 12= 135+0.5=

0.5 1+ 17= 32.8+ 19= 5.2- 1.3= 1.6×0.4=

8 1- 100 Question:

4+0.25= 0.36+ 1.54= 80-25= 70+45=

560×2= 16×6= 300×6= 540÷9=

30×20= 400÷4= 350-80= 160+70=

18-64÷8= 42÷6+20= 40-5×7= 80+60÷3=

4 1+ 18÷2= 75- 1 1×5= 42+7-29= 5600÷80= 17×40= 100-63= 3.2+ 1.68= 2.8×0.4=

14-7.4= 1.92÷0.04= 0.32×500= 0.65+4.35=

10-5.4= 4÷20= 3.5×200= 1.5-0.06=

0.75÷ 15= 0.4×0.8= 4×0.25= 0.36+ 1.54=

1.0 1×99= 420÷35= 25× 12= 135÷0.5=

3/4 + 1/4 = 2 + 4/9 = 3 - 2/3 = 3/4 - 1/2=

1/6 + 1/2 - 1/6 = 7.5-(2.5+3.8)= 7/8 + 3/8 =

3/ 10 + 1/5 = 4/5 - 7/ 10 = 2 - 1/6 - 1/3 =

0.5 1÷ 17= 32.8+ 19= 5.2÷ 1.3= 1.6×0.4=

4.9×0.7= 1÷5= 6÷ 12= 0.87-0.49=800÷8= 40×70= 300÷5≈ 59×72≈ 25 1÷5≈ 630÷7=

13 1÷6≈ 0× 108= 45- 18= 0÷ 15= 120÷4= 30×40=

640-70= 1800÷9= 99×39≈ 5. 1+2.6= 4 1 1÷4≈ 15×20=

7.3- 1.8= 250÷5= 6300÷9= 43 1÷6≈ 20×80= 78-56=

49 1÷8≈ 14×6= 4.8-4.4= 6. 1+4.7= 9 1× 19≈ 367÷4≈

55 ÷ 5 =10× 40 = 21-30 =134+28 = 50× 40-100 =12×.

Three-year class name _ _ _ _ _ _ _

70÷7= 20× 10= 3200÷5≈ 54×70≈ 25 1÷4≈ 6300÷7=

13 1÷4≈ 50×8= 85-45= 0÷5= 280÷4= 60×40=

840-30= 2700÷9= 99×3 1≈ 3. 1+2.7= 13 1÷4≈ 50×8=

7.8- 1.8= 350÷5= 630÷9= 13 1÷6≈ 10×80= 65-56=

43 1÷6≈ 15×6= 4.8-0.4= 6. 1+0.7= 9 1× 18≈ 257÷4≈

44÷4= 20×40= 2 10-30= 34+28 = 63- 63÷9= 120÷3×20=

7×40= 100-63= 3.2+ 1.68= 2.8×0.4=

14-7.4= 1.92÷0.04= 0.32×500= 0.65+4.35=

10-5.4= 4÷20= 3.5×200= 1.5-0.06=

0.75÷ 15= 0.4×0.8= 4×0.25= 0.36+ 1.54=

1.0 1×99= 420÷35= 25× 12= 135÷0.5=

3/4 + 1/4 = 2 + 4/9 = 3 - 2/3 = 3/4 - 1/2=

1/6 + 1/2 - 1/6 = 7.5-(2.5+3.8)= 7/8 + 3/8 =

3/ 10 + 1/5 = 4/5 - 7/ 10 = 2 - 1/6 - 1/3 =

0.5 1÷ 17= 32.8+ 19= 5.2÷ 1.3= 1.6×0.4=

4.9×0.7= 1÷5= 6÷ 12= 0.87-0.49=

In the 2005-2006 school year, the third-grade students reviewed the oral calculation questions at the end of the semester (1).

70÷7= 20× 10= 320÷5≈ 54×70≈ 25 1÷4≈ 6300÷7=

13 1÷4≈ 50×8= 85-45= 0÷5= 280÷4= 60×40=

840-30= 2700÷9= 99×3 1≈ 3. 1+2.7= 13 1÷4≈ 50×8=

7.8- 1.8= 350÷5= 630÷9= 13 1÷6≈ 10×80= 65-56=

43 1÷6≈ 15×6= 4.8-0.4= 6. 1+0.7= 9 1× 18≈ 257÷4≈

44÷4= 20×40= 2 10-30= 34+28 = 63- 63÷9= 120÷3×

In the 2005-2006 school year, the third grade students reviewed the oral calculation questions at the end of mathematics (2)

800÷8= 40×70= 300÷4≈ 59×72≈ 25 1÷5≈ 630÷7=

13 1÷6≈ 0× 108= 45- 18= 0÷ 15= 120÷4= 30×40=

640-70= 1800÷9= 99×39≈ 5. 1+2.6= 4 1 1÷4≈ 15×20=

7.3- 1.8= 250÷5= 6300÷9= 43 1÷6≈ 20×80= 78-56=

49 1÷8≈ 14×6= 4.8-4.4= 6. 1+4.7= 9 1× 19≈ 367÷4≈

55÷5= 10×40= 2 1 1-30= 134+28 = 50×40- 100= 12×20÷

In the 2005-2006 school year, the third-grade students reviewed the oral math problem (3) at the end of the semester.

Three-year class name _ _ _ _ _ _ _

270÷9= 20× 1 1= 120÷5≈ 44× 17≈ 35 1÷4≈ 420÷7=

23 1÷4≈ 50×80= 73-45= 0÷25= 1600÷4= 20×40=

840-32= 540÷9= 89×3 1≈ 0. 1+0.8= 37 1÷4≈ 0×28=

8.3- 1.8= 2000÷5= 180÷9= 13 1÷6≈ 40×80= 85-5 1=

53 1÷6≈ 10×60-= 4.5-4.5= 6.8+0.2= 4 1× 19≈ 250÷4≈

270÷3= 1 1×50= 2 10-30= 68+28 = 25+25×2= 30÷3× 10=

[center] [b] Review oral calculation questions at the end of the third grade mathematics in the 2005-2006 school year (4) [/b][/center]

Three-year class name _ _ _ _ _ _ _

100÷ 1= 30×70= 100÷5≈ 19×72≈ 25 1÷6≈ 140÷7=

234÷6≈ 120×0= 445- 15= 0÷85= 200÷4= 300×40=

740-70= 2700÷9= 9 1×33≈ 4. 1+2.4= 4 19÷4≈ 14×20=

7.8- 1.8= 1000÷5= 360÷9= 338÷6≈ 100×80= 98-56=

49 1÷8≈ 14×6= 4. 1-3. 1= 6.8+0.7= 1 1× 19≈ 167÷4≈

150÷5= 10×40= 100-30= 96+28 = 5 1+45-28= 10×20+34=