计算下面各题,能简算的要用简便方法算.667÷23×1125×77-37×2590.72÷7.2+5.3×81.25×7×3.2 9
计算下面各题,能简算的要用简便方法算.667÷23×1125×77-37×2590.72÷7.2+5.3×81.25×7×3.298÷(14+2.5×25)...
计算下面各题,能简算的要用简便方法算.667÷23×1125×77-37×2590.72÷7.2+5.3×81.25×7×3.2 9 8 ÷( 1 4 +2.5× 2 5 )
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(1)667÷23×11, =29×11, =319; (2)25×77-37×25, =25×(77-37), =25×40, =1000; (3)90.72÷7.2+5.3×8, =12.6+42.4, =55; (4)1.25×7×3.2, =1.25×7×8×0.4, =(1.25×8)×(7×0.4), =10×2.8, =28; (5)
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