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!!!!!
2024-11-18 04:41:07
推荐回答(3个)
回答1:

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

希望有帮助

回答2:

晕.
(1)=0.25乘0.4乘0.9
=0.09

(2)=8.35乘(100-2)
=8.35乘100-8.35乘2
=835-16.7
=818.3

(3)=0.97乘(99+1)
=0.97乘100
=97

(4)=0.87乘(100+1)
=0.87乘100+0.87
=87+0.87
=87.87

回答3:

太难