15.2×2.4+1.52×76和1.25×0.25×32
题目
15.2×2.4+1.52×76和1.25×0.25×32
答案
15.2×2.4+1.52×76
=15.2×2.4+15.2×7.6
=15.2×(2.4+7.6)
=15.2×10
=152
1.25×0.25×32
=1.25×0.25×4×8
=1.25×8×0.25×4
=10×1
=10
举一反三
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