用递等式计算。(能简便计算的用简便方法计算) 3.25+0.4+1.75+0.6

2024-11-22 11:29:39
推荐回答(2个)
回答(1):

用递等式计算。(能简便计算的用简便方法计算)
3.25+0.4+1.75+0.6
=(3.25+1.75)+(0.4+0.6)
=5+1
=6

2.5×2.8+4
=7+4
=11

8.79×9.8+8.79×0.2
=8.79*(9.38+0.2)
=8.79*10
=87.9

(8+0.8)×1.25
=1.25*0.8*11
=1*11
=11

回答(2):

网络错误