题目
用自己喜欢的方法计算下面各题。
(1)
65+5.96+6.35
(2)
13.74+7.28-6.77
(3)
7.82+3.4-0.82+6.6
(4)
6.78+2.3-4.35
答案: 65+5.96+6.35 =65+(5.96+6.35)=65+12.31=77.31
13.74+7.28-6.77=13.74+(7.28-6.77)=13.74+0.51=14.25
7.82+3.4-0.82+6.6=7.82-0.82+(3.4+6.6)=7+10=17
6.78+2.3-4.35=6.78-4.35+2.3=2.43+2.3=4.73