50道简便计算题及答案45,加70括号乘以五(1)2.5*32*0.125=(2.5*4)*(8*0.125)(2)3.5-7+6.5=3.5+6.5-7(3)1.2×2.5+0.8×2.5=2.5(1.2+0.8)(4)8.9×1.25-0.9×1.25=1.25(8.9-0.9)(5)12.5×7.4×0.8=12.5×0.8×7.4(6)6.5×9.5 …
分配律
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50道简便计算题及答案45,加70括号乘以五(1)2.5*32*0.125=(2.5*4)*(8*0.125)(2)3.5-7+6.5=3.5+6.5-7(3)1.2×2.5+0.8×2.5=2.5(1.2+0.8)(4)8.9×1.25-0.9×1.25=1.25(8.9-0.9)(5)12.5×7.4×0.8=12.5×0.8×7.4(6)6.5×9.5 …