9.9×3.4-6.6×0.1简便方法
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3.4x9.9=3.4x(10-0.1)=3.4x10-3.4x0.1=34-0.34=33.66
咨询记录 · 回答于2022-09-28
9.9×3.4-6.6×0.1简便方法
亲 您好这是几年级的
5年级
怎么解
3.4x9.9=3.4x(10-0.1)=3.4x10-3.4x0.1=34-0.34=33.66
6.6×10.1 =6.6×(0.55+0。55) =6.6×0.55+6.6×0.55 =0.33+0.33 =0.66
6.6×0.1 =6.6×(0.55+0。55) =6.6×0.55+6.6×0.55 =0.33+0.33 =0.66