6.8×0.1+0.5×68+0.049×680怎样简便计算

2025-02-12 02:03:38
推荐回答(2个)
回答1:

解:
6.8 x 0.1 + 0.5 x 68 + 0.049 x 680
= 68 x 0.01 + 68 x 0.5 + 68 x 0.49
= 68 x (0.01 + 0.5 + 0.49)
= 68 x (0.5 + 0.5)
= 68 x 1
= 68

回答2:

=68*(0.1*0.1+0.5+0.049*10)=68*(0.01+0.5+0.49)=68*1=68
求采纳!