神机“妙算”: 2.37×6.3+2.37×3.7 2.5×1.25×0.32 3.8×10.1 2.4×0.8-4.48÷2.8 12.6÷[(8.06÷2-3.13)×1.4].
问题描述:
神机“妙算”:
2.37×6.3+2.37×3.7
2.5×1.25×0.32
3.8×10.1
2.4×0.8-4.48÷2.8
12.6÷[(8.06÷2-3.13)×1.4].
答
(1)2.37×6.3+2.37×3.7=2.37×(6.3+3.7)=2.37×10=23.7;(2)2.5×1.25×0.32=2.5×1.25×0.8×0.4=(2.5×0.4)×(1.25×0.8)=1×1=1;(3)3.8×10.1=3.8×(10+0.1)=3.8×10+3.8×0.1=38+0.38=38.38;(...