①3/4×7/8÷0.75
=(34÷0.75 )x78
=(34÷34)x78
=78
②（2/5-3/8)×40
=25x40-38x40
=16-15
=1
③2/7-9/16×2/7
=27x(1-916)
=27x716
=18
①3/4×7/8÷0.75 ②（2/5-3/8)×40 ③2/7-9/16×2/7
2个回答
相关问题
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（5.3×3.75+3.75×3.5）÷2.2 9.6÷（4.8×7.2+2.8×4.8）
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5×3= 4×3= 2×9= 7×2= 18÷6= 15÷5 40÷5= 21÷7= 4×4= 8×4= 4×7= 5×
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1÷0.5= 5÷40= 2.4×3= 0.8×0.5= 12-8.9= 3.2÷0.8= 4.01÷100= 1.7×
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9.1×3= 0.8×7= 5.6÷2= 11÷3= 40×0.5= 10-0.1= 2.48÷0.8= 2.1÷0.7
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（1）4.89×0.5×2 （2）20.16÷7.2+6.8 （3）4.5×2.7+4.5×5.3
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口算．7.5+9.2= 9-2.7= 16-0.9= 2.6×0.3= 4.5÷0.9= 8.5×10= 5.2÷0.2
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7.2+2.8= 0.9÷0.01= 3.5+7.6= 3×0.2×0.5= 0.96÷0.3= 1.5×0.4= 7÷