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The first volume of the fourth grade calculates 400 offline, and there is an answer.
The first volume of the fourth grade calculates 400 offline, and there is an answer. 1、 1.25×(8+ 10)= 1.25×8+ 1.25× 10= 10+ 12.5=22.5

2、 1.24+0.78+8.76=( 1.24+8.76)+0.78= 10+0.78= 10.78

3、 1/2-(4/5- 1/2)= 1/2+ 1/2-4/5= 1-4/5= 1/5

4、4800÷25÷4 = 4800÷(25 x4)= 4800÷ 100 = 4800÷ 100 = 48

5、2/5-(3/8-3/5)=2/5+3/5-3/8= 1-3/8=5/8

6、3/4-(3/7- 1/4)=3/4+ 1/4-3/7= 1-3/7=4/7

7、3.2x 0. 125 x 2.5 = 0. 125 x8x(0.4x 2.5)= 1x 1 = 1

8、0.4× 125×25×0.8=(0.4×25)×( 125×0.8)= 10× 100= 1000

9、 1.25×(8+ 10)= 1.25×8+ 1.25× 10= 10+ 12.5=22.5

10、9 123-( 123+8.8)=9 123- 123-8.8=9000-8.8=899 1.2

1 1、 1.24×8.3+8.3× 1.76=8.3×( 1.24+ 1.76)=8.3×3=24.9

12、9999× 100 1=9999×( 1000+ 1)=9999× 1000+9999× 1= 10008999

13、 14.8×6.3-6.3×6.5+8.3×3.7=( 14.8- ? 6.5)×6.3+8.3×3.7=8.3×6.3+8.3×3.7=8.3×(6.3+3.7)=8.3× 10=83

14、 1.24+0.78+8.76=( 1.24+8.76)+0.78= 10+0.78= 10.78

15、933- 157-43=933-( 157+43)=933-200=733

16、482 1-998=482 1- 1000+2=3823

17、32× 125×25=4×8× 125×25=(4×25)×(8× 125)= 100× 1000= 100000

18、 1.8+ 18÷ 1.5-0.5×0.3= 1.8+ 12-0. 15= 13.8-0. 15= 13.65

19、6.5×8+3.5×8-47=52+28-47=80-47

20、3.7x 2.56-2.3 = 9.472-2.3 = 7. 172

2 1、 1.24+0.78+8.76=( 1.24+8.76)+0.78= 10+0.78= 10.78

22、 1/2-(4/5- 1/2)= 1/2+ 1/2-4/5= 1-4/5= 1/5

23、4800÷25÷4 = 4800÷(25 x4)= 4800÷ 100 = 4800÷ 100 = 48

24、2/5-(3/8-3/5)=2/5+3/5-3/8= 1-3/8=5/8

25、3/4-(3/7- 1/4)=3/4+ 1/4-3/7= 1-3/7=4/7

26、3.2x 0. 125 x 2.5 = 0. 125 x8x(0.4x 2.5)= 1x 1 = 1

27、0.4× 125×25×0.8=(0.4×25)×( 125×0.8)= 10× 100= 1000

28、 1.25×(8+ 10)= 1.25×8+ 1.25× 10= 10+ 12.5=22.5

29、9 123-( 123+8.8)=9 123- 123-8.8=9000-8.8=899 1.2

30、 1.24×8.3+8.3× 1.76=8.3×( 1.24+ 1.76)=8.3×3=24.9

3 1、9999× 100 1=9999×( 1000+ 1)=9999× 1000+9999× 1= 10008999

32、 14.8×6.3-6.3×6.5+8.3×3.7=( 14.8-6.5)×6.3+8.3×3.7=8.3×6.3+8.3×3.7=8.3×(6.3+3.7)=8.3× 10=83

33、 1.24+0.78+8.76=( 1.24+8.76)+0.78= 10+0.78= 10.78

34、933- 157-43=933-( 157+43)=933-200=733

35、482 1-998=482 1- 1000+2=3823

36、32× 125×25=4×8× 125×25=(4×25)×(8× 125)= 100× 1000= 100000

37、 1.8+ 18÷ 1.5-0.5×0.3= 1.8+ 12-0. 15= 13.8-0. 15= 13.65

38、6.5×8+3.5×8-47=52+28-47=80-47

39、3.7x 2.56-2.3 = 9.472-2.3 = 7. 172

40、 1.65×99+ 1.65 = 1.65*(99+ 1)= 1.65* 100= 165

exclusive of

Off-line calculation is a recursive equation calculation, which is an operation that writes out the calculation process completely, that is, off-line calculation. When calculating mixed operations, it is usually to work out an expression step by step (step by step, you can't write an equal sign on the original formula), and the process of each step should be written out. Generally speaking, the equal sign should go forward and not be aligned with the first line. That is, to leave the original calculation. The main thing to master is to remember to calculate multiplication and division before adding and subtracting. In the continuous calculation of multiplication and division, it should be calculated from left to right. When you encounter parentheses, you must first calculate the inside of parentheses. In the process of disassembly, the operation sequence line should be drawn according to the operation sequence.

Fourth grade 540 out-of-step calculations, with answers. Open Baidu

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There should be an answer of 1 in the calculation of the first volume of grade four.

6.5*8+3.5*8-47

=(6.5+3.5)*8-47

=80-47

=33

2.

14*2.25+ 14*3.75

=(2.25+3.75)* 14

=6* 14

=84

3.

3.5*0.8+5.5*0.8+0.8

=(3.5+5.5+ 1)*0.8

= 10*0.8

=8

4.

7.28- 1.5*2.4+2.72

=(7.28+2.72)- 1.5*2.4

= 10-3.6

=6.4

5.

0. 125*45.6*0.8

=0. 125*0.8*45.6

=4.56

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For the fourth grade, there is an answer. 100 offline calculation.

408- 12×24 (46+28)×60 42×50- 17 15÷5

32+ 105÷5 ( 108+47)×52 420×(327-238)

(4 12 1+2389)÷7 67 1× 15-974 469× 12+ 1492

405×(32 13-3 189) 5000-56×23 125×(97-8 1)

6942+480÷3 304×32- 154 20+80÷4-20=

100÷(32-30)×0= 25×4- 12×5=

70×〔(42-42)÷ 18〕= 75×65+75×35=

Calculate the following questions in a simple way.

1、89+ 124+ 1 1+26+48 2、875- 147-23

3.25× 125×40×8 4、 147×8+8×53

5、 125×64 6、0.9+ 1.08+0.92+0. 1

Calculate in a simple way

①89+ 124+ 1 1+26+48 ②875- 147-23

③ 147×8+8×53 ④ 125×64

Calculate the following questions.

1.280+840÷24×5 2.85×(95- 1440÷24)

3.58870÷( 105+20×2) 4.80400-(4300+870÷ 15)

5. 1437×27+27×563 6.8 1432÷( 13×52+78)

7. 125×(33- 1) 8.37.4-(8.6+7.24-6.6)

Do the math. ( 1∶ 1)

( 1) 156× 107-7729 (2)37.85-(7.85+6.4)

(3)287×5+96990÷3 18 (4) 1554÷[(72-58)×3]

exclusive of

2800÷ 100+789 (947-599)+76×64

1.36×(9 13-276÷23) 2.(93+25×2 1)×9

3.507÷ 13×63+498 4.723-(52 1+504)÷25

5.384÷ 12+23×37 1 6.(39-2 1)×(396÷6)

( 1) 156×[( 17.7-7.2)÷3] (2)[37.85-(7.85+6.4)] ×30

(3)28×(5+969.9÷3 18) (4)8 1÷[(72-54)×9]

57× 12-560÷35 848-640÷ 16× 12

960÷( 1500-32×45) [ 192-(54+38)]×67

138×25×4 ( 13× 125)×(3×8) ( 12+24+80)×50 704×25 25×32× 125 32×(25+ 125)

178× 10 1- 178 84×36+64×84 75×99+2×75 83× 102-83×2 98× 199

123× 18- 123×3+85× 123 50×(34×4)×3 25×(24+ 16) 178×99+ 178

79×42+79+79×57 7300÷25÷4 8 100÷4÷75 75×27+ 19×2 5 3 1×870+ 13×3 10

4×(25×65+25×28) 138×25×4 ( 13× 125)×(3×8) ( 12+24+80)×50

25×32× 125 32×(25+ 125) 102×76 58×98

178× 10 1- 178 84×36+64×84 75×99+2×75 83× 102-83×2

98× 199 123× 18- 123×3+85× 123 50×(34×4)×3 25×(24+ 16)

178×99+ 178 79×42+79+79×57 7300÷25÷4 8 100÷4÷75

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Too simple

Use a simple method to calculate the disjunction and answer calculation of the first volume of grade four. Examples are as follows

1、368+2649+ 135 1 =368+(2649+ 135 1)=368+4000=4368

2、 89+ 10 1+ 1 1 1=(89+ 1 1 1)+ 10 1=200+ 10 1=30 1

3、24+ 127+476+573=(24+476)+( 127+573)=500+700= 1200

4、400-273- 127=400-(273+ 127)=0

5、327+(96- 127)=327- 127+96=296

As you can see, the addition and subtraction commutative law and associative law are used.

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There are 260 answers in the first volume of Grade Four: 25-15-80 =10-80 =-70.

26 -6 -64 = 20 -64 = -44

27 + 3 -48 = 30 -48 = - 18

28 + 12 -32 = 40 -32 = 8

29 + 2 1 - 16 = 50 - 16 = 34

30 + 30 + 0 = 60 + 0 = 60

3 1 + 39 + 16 = 70 + 16 = 86

32 + 48 + 32 = 80 + 32 = 1 12

33 + 57 + 48 = 90 + 48 = 138

34 + 66 + 64 = 100 + 64 = 164

35 + 75 + 80 = 1 10 + 80 = 190

36 + 84 + 96 = 120 + 96 = 2 16

37 + 93 + 1 12 = 130 + 1 12 = 242

38 + 102 + 128 = 140 + 128 = 268

39 + 1 1 1 + 144 = 150 + 144 = 294

40 -30 - 140 = 10 - 140 = - 130

4 1 -2 1 - 124 = 20 - 124 = - 104

42 - 12 - 108 = 30 - 108 = -78

43 -3 -92 = 40 -92 = -52

44 + 6 -76 = 50 -76 = -26

45 + 15 -60 = 60 -60 = 0

46 + 24 -44 = 70 -44 = 26

47 + 33 -28 = 80 -28 = 52

48 + 42 - 12 = 90 - 12 = 78

49 + 5 1 + 4 = 100 + 4 = 104

50 + 60 + 20 = 1 10 + 20 = 130

5 1 + 69 + 36 = 120 + 36 = 156

52 + 78 + 52 = 130 + 52 = 182

53 + 87 + 68 = 140 + 68 = 208

54 + 96 + 84 = 150 + 84 = 234

55 -45 -200 = 10 -200 = - 190

56 -36 - 184 = 20 - 184 = - 164

57 -27 - 168 = 30 - 168 = - 138

58 - 18 - 152 = 40 - 152 = - 1 12

59 -9 - 136 = 50 - 136 = -86

60 + 0 - 120 = 60 - 120 = -60

6 1 + 9 - 104 = 70 - 104 = -34

62 + 18 -88 = 80 -88 = -8

63 + 27 -72 = 90 -72 = 18

64 + 36 -56 = 100 -56 = 44

65 + 45 -40 = 1 10 -40 = 70

66 + 54 -24 = 120 -24 = 96

67 + 63 -8 = 130 -8 = 122

68 + 72 + 8 = 140 + 8 = 148

69 + 8 1 + 24 = 150 + 24 = 174

70 -60 -260 = 10 -260 = -250

7 1 -5 1 -244 = 20 -244 = -224

72 -42 -228 = 30 -228 = - 198

73 -33 -2 12 = 40 -2 12 = - 172

74 -24 - 196 = 50 - 196 = - 146

1 1 3^3-5

12 4^2-34%

13 3.25-3 15%

14 7^3+445%

15 12+5268.32-2569

16 123+456-52*8

17 45%+6325

18 1/2+ 1/3+ 1/4

19 789+456-78 360÷[( 12+6)×5]

288÷[(26- 14)×8]

500×6-(50×2-80)

( 105× 12-635)÷25

864÷[(27-23)× 12]

(45+38- 16)×24

500-(240+38×6)

[64-(87-42)] × 15

(845- 15×3)÷ 16 12×[(49-28)÷7]

450÷[(84-48] )÷ 12

(58+37)÷(64-9×5)

95÷(64-45)

178- 145÷5×6+42

8 12-700÷(9+3 1× 1 1)

85+ 14×( 14+208÷26)

(284+ 16)×(5 12-8208÷ 18)

120-36×4÷ 18+35

(58+37)÷(64-9×5)

(6.8-6.8×0.55)÷8.5

0. 12× 4.8÷0. 12×4.8

(3.2× 1.5+2.5)÷ 1.6

6- 1.6÷4= 5.38+7.85-5.37=

7.2÷0.8- 1.2×5= 6- 1. 19×3-0.43=

6.5×(4.8- 1.2×4)=

5.8×(3.87-0. 13)+4.2×3.74

32.52-(6+9.728÷3.2)×2.5

[(7. 1-5.6)×0.9- 1. 15] ÷2.5

5.4÷[2.6×(3.7-2.9)+0.62]

12×6÷( 12-7.2)-6

12×6÷7.2-6

0.68× 1.9+0.32× 1.9

(58+370)÷(64-45)

420+580-64×2 1÷28

( 136+64)×(65-345÷23)

48. 10. 15- 10.75×0.4-5.7

388+(5000- 1000)

158+262+ 138

375+2 19+38 1+225

500 1-247- 102 1-232

( 18 1+2564)+27 19

378+44+ 1 14+242+222

276+228+353+2 19

(375+ 1034)+(966+ 125)

(2 130+783+270)+ 10 17

99+999+9999+99999

7755-(2 187+755)

22 14+638+286

3065-738- 1065

899+344

2357- 183-3 17-357

2365- 1086-2 14

497-299

2370+ 1995

3999+498

1883-398

12×25

75×24

138×25×4

( 13× 125)×(3×8)

( 12+24+80)×50

704×25 25×32× 125

32×(25+ 125) 88× 125

102×76 58×98

178× 10 1- 178

84×36+64×84

75×99+2×75

83× 102-83×2

98× 199

123× 18- 123×3+85× 123

50×(34×4)×3

25×(24+ 16)

178×99+ 178

79×42+79+79×57

7300÷25÷4

8 100÷4÷75

16800÷ 120

30 100÷2 100

32000÷400

49700÷700

1248÷24

3 150÷ 15

4800÷25

2356-( 1356-72 1)

1235-( 1780- 1665)

75×27+ 19×2 5

3 1×870+ 13×3 10

4×(25×65+25×28)

( 18 1+2564)+27 19

378+44+ 1 14+242+222

276+228+353+2 19

(375+ 1034)+(966+ 125)

(2 130+783+270)+ 10 17

99+999+9999+99755-(2 187+755)

22 14+638+286 3065-738- 1065

899+344

2357- 183-3 17-357 2365- 1086-2 14

497-299

2370+ 1995

3999+498

1883-398

12×25 75×24

138×25×4

( 13× 125)×(3×8)

( 12+24+80)×50

704×25

25×32× 125

32×(25+ 125)

88× 125

102×76

58×98

178× 10 1- 178

84×36+64×84

75×99+2×75 83× 102-83×2

98× 199

123× 18- 123×3+85× 123

50×(34×4)×3

25×(24+ 16)

178×99+ 178

79×42+79+79×57

7300÷25÷4

8 100÷4÷75

16800÷ 120

30 100÷2 100

32000÷400

49700÷700

1248÷24

3 150÷ 15

4800÷25

2 1500÷ 125

2356-( 1356-72 1)

20 45%+54%-36

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