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脱式计算及答案(带过程)..docx
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脱式计算及答案(带过程)..docx
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脱式计算及答案(带过程)
62×7.1+2.9
=440.2+2.9
=443.1
4.2×0.25
=(4+0.2)×0.25
=4×0.25+0.2×0.2
5
=1+0.05
=1.05
5.2×4.3+0.8×4.3
=(5.2+0.8)×4.3
=6×4.3
=25.8
8.5+1.5÷0.25×4
=8.5+6×4
=8.5+24
=32.5
0.25×0.8+2.5%
=0.2+2.5%
=0.225
32×125×2.5
=4×8×125×2.5
=8×125×(4×2.5
)
=1000×10
=10000
94÷(6.84×8.5-
31.46÷0.55)
=94÷(58.14-
57.2)
=94÷0.94
=100
13÷0.4÷2.5
=13÷(0.4×2.5)
=13÷1
=13
1.25×2.5×0.8
=(1.25×0.8)×2.
5
=1×2.5
=2.5
1.5×101-1.5
=1.5×(101-1)
=1.5×100
=150
4.8×101
=4.8×100+4.8×1
=480+4.8
=484.8
3.25×4.7-7.8
=15.275-7.8
=7.475
0.57+0.43×0.24
=0.57+0.1032
=0.6732
945÷5÷3
=189÷3
=63
152×3÷2
=456÷2
=228
43×12×6
=516×6
=3096
200+25×33
=200+825
=1025
(25+26)×48
=51×48
=2448
576-(290+107)
=576-397
=179
649+124-556
=773-556
=217
4.82-5.2÷0.8×0.6
=4.82-6.5×0.6
=4.82-3.9
=0.92
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