2.22乘以34加6.66乘以22的简便计算
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答案222,简便计算。
2.22x34+6.66x22
=2.22x34+2.22x3x22
=2.22x34+2.22x66
=2.22x(34+66)
=2.22x100
=222
咨询记录 · 回答于2023-12-28
2.22乘以34加6.66乘以22的简便计算
答案222,简便计算。
2.22x34+6.66x22
=2.22x34+2.22x3x22
=2.22x34+2.22x66
=2.22x(34+66)
=2.22x100
=222
答案222,简便计算。
2.22x34+6.66x22
=2.22x34+2.22x3x22
=2.22x34+2.22x66
=2.22x(34+66)
=2.22x100
=222
运用数学拆分的思想,6.66=2.22x3,所以6.66x22=2.22x3x22=2.22x66
然后运用乘法分配律的逆运算,axb+axc=ax(b+c)
11-5.5*(2.1-0.11)
11-5.5x(2.1-0.11) =11-5.5x1.99 =11-5.5x(2-0.01) =11-5.5x2+5.5x0.01 =11-11+0.055 =0.055