四年级递等式计算150道速度因为是暑假作业~要有答案啊~~~-查字典问答网
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  四年级递等式计算150道速度因为是暑假作业~要有答案啊~~~

  四年级递等式计算150道速度因为是暑假作业~

  要有答案啊~~~

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2020-04-16 21:31
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  (720+270)÷55-120÷24

  =990÷55-120÷(12×2)

  =990÷110×2-120÷12÷2

  =9×2-10÷2

  =18-5

  =13

  (63+480÷16)-29

  =(63+30×16÷16)-29

  =63+30-30+1

  =64

  13.67-2.97+25.8

  =13.67-3+0.03+25.8

  =10.67+0.03+25.8

  =10.7+25.8

  =36.5

  7.06-2.78+13.78

  =7.06+13.78-2.78

  =7.06-(13.78-2.78)

  =7.06+11

  =18.06

  0.64×25×7.8+2.2

  =0.16*4*25*7.8+2.2

  =0.16*100*7.8+2.2

  =16*7.8+2.2

  =127

  2÷2.5+2.5÷2

  =4/5+5/4

  =2.05

  194-64.8÷1.8×0.9

  =194-36*0.9

  =194-32.4

  =161.6

  36.72÷4.25×9.9

  =8.64*9.9

  =85.536

  5180-705×6

  =5180-4230

  =950

  24÷2.4-2.5×0.8

  =10-2

  =8

  (4121+2389)÷7

  =6510/7

  =930

  671×15-974

  =10065-974

  =9091

  469×12+1492

  =5628+1492

  =7120

  405×(3213-3189)

  =405*24

  =9720

  1)、0.36x1.5x0.4=0.4x5x0.36x0.3=2x0.108=0.216

  2)、0.05x3.2x40=0.05x40x3.2=2x3.2=6.4

  3)、3.78x0.5-0.65=3.78x0.5-1.3x0.5=(3.78-1.3)x0.5=2.48x0.5=1.24

  4)、13.4x0.24+3.98=13.4x0.6x0.4+3.98=8.04x0.4+3.98=3.216+3.98=7.196

  5)、3.8x41-3.8=3.8x(41-1)=3.8x40=152

  6)、0.3x2.5x0.4=0.3x1=0.3

  7)、0.78x101=0.78x100+0.78x1=78+0.78=78.78

  8)、1.2x2.5+0.8x2.5=(1.2+0.8)x2.5=2x2.5=5

  9)、9.8x25=10x25-0.2x25=250-5=245

  10)、0.8x630x0.125=0.8x0.125x630=0.1x630=63

  11)、198x0.51=200x0.51-2x0.51=102-1.02=100.98

  12)、2.5x3.7+6.3x2.5=(3.7+6.3)x2.5=10x2.5=25

  (45-17)+(9-3)=28+6=34,

  (45-17)+(9-6)=28+3=31,

  (45-18)+(9-3)=27+6=33

  (45-18)+(9-6)=27+3=30,

  (45-27)+(9-3)=18+6=24,

  (45-27)+(9-6)=18+3=21

  (45-28)+(9-3)=17+6=23,

  (45-28)+(9-6)=17+3=20,

  (46-17)+(8-3)=29+5=34

  (46-17)+(8-5)=29+3=32,

  (46-19)+(8-3)=27+5=32,

  (46-19)+(8-5)=27+3=30

  (46-27)+(8-3)=19+5=24,

  (46-27)+(8-5)=19+3=22,

  (46-29)+(8-3)=17+5=22

  (46-29)+(8-5)=17+3=20,

  (54-16)+(9-2)=38+7=45,

  (54-16)+(9-7)=38+2=40

  (54-18)+(9-2)=36+7=43,

  (54-18)+(9-7)=36+2=38,

  (54-36)+(9-2)=18+7=25

  (54-36)+(9-7)=18+2=20,

  (54-38)+(9-2)=16+7=23,

  (54-38)+(9-7)=16+2=18

  (57-18)+(6-2)=39+4=43,

  (57-18)+(6-4)=39+2=41,

  (57-19)+(6-2)=38+4=42

  (57-19)+(6-4)=38+2=40,

  (57-38)+(6-2)=19+4=23,

  (57-38)+(6-4)=19+2=21

  (57-39)+(6-2)=18+4=22,

  (57-39)+(6-4)=18+2=20,

  (63-15)+(9-2)=48+7=55

  (63-15)+(9-7)=48+2=50,

  (63-18)+(9-2)=45+7=52,

  (63-18)+(9-7)=45+2=47

  (63-45)+(9-2)=18+7=25,

  (63-45)+(9-7)=18+2=20,

  (63-48)+(9-2)=15+7=22

  (63-48)+(9-7)=15+2=17,

  (64-25)+(8-1)=39

2020-04-16 21:35:09

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