0.42✖️0.85➕0.3✖️0.21简便计算
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您好呀,0.42×0.85+0.3×0.21简便运算:(0.4+0.02)×0.85+0.3×(0.2+0.01)=0.4×0.85+0.02×0.85+0.3×0.2+0.3×0.01=0.34+0.017+0.06+0.003=0.42
咨询记录 · 回答于2023-01-06
0.42✖️0.85➕0.3✖️0.21简便计算
您好呀,0.42×0.85+0.3×0.21简便运算:(0.4+0.02)×0.85+0.3×(0.2+0.01)=0.4×0.85+0.02×0.85+0.3×0.2+0.3×0.01=0.34+0.017+0.06+0.003=0.42
8.5✖️1.25➕1.25➖6.3➗0.8
您好呀,8.5×1.25+1.25-6.3÷8=(8.5+1)×1.25-(6.4-0.1)÷8=9.5×1.25-0.8+0.0125=11.0875
3.75➗0.25➕6.25✖️4
老师请您帮我解答
谢谢
您好呀,3.75÷0.25+6.25×4=(3+0.75)÷0.25+(6+0.25)×4=15+25=40