脱式计算及答案（带过程）.doc

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1、62×7.1+2.9=440.2+2.9=443.14.2×0.25=（4+0.2）×0.25=4×0.25+0.2×0.25=1+0.05=1.055.2×4.3+0.8×4.3=（5.2+0.8）×4.3=6×4.3=25.88.5+1.5÷0.25×4=8.5+6×4=8.5+24=32.50.25×0.8+2.5%=0.2+2.5%=0.22532×125×2.5=4×8×125×2.5=8×125×（4×2.5）=1000×10=1000094÷（6.84×8.5-31.46÷0.55）=94÷（58.14-57.2）=94÷0.94=10013÷0

2、.4÷2.5=13÷（0.4×2.5）=13÷1=131.25×2.5×0.8=（1.25×0.8）×2.5=1×2.5=2.51.5×101-1.5=1.5×（101-1）=1.5×100=1504.8×101=4.8×100+4.8×1=480+4.8=484.83.25×4.7-7.8=15.275-7.8=7.4750.57+0.43×0.24=0.57+0.1032=0.6732945÷5÷3=189÷3=63152×3÷2=456÷2=22843×12×6=516×6=3096200+25×33=200+825=1025（25+26）×48=51×

3、48=2448576-（290+107）=576-397=179649+124-556=773-556=2174.82-5.2÷0.8×0.6=4.82-6.5×0.6=4.82-3.9=0.92