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数学专家来看看,这几道题的简便运算0.25x0.9x0.48.35x980.97x99+0.970.87x101======全部用脱式计算!

题目详情
数学专家来看看,这几道题的简便运算
0.25x0.9x0.4 8.35x98 0.97x99+0.97 0.87x101
= =
= =
= = 全部用脱式计算!
▼优质解答
答案和解析
0.25x0.9x0.4
=0.25x0.4x0.9
=0.1x0.9
=0.09
8.35x98
=8.35x(100-2)
=835-16.7
=818.3
0.97x99+0.97
=0.97x(99+1)
=0.97x100
=97
0.87x101
=0.87x(100+1)
=87+0.87
=87.87