用简便算法计算下列各题。(1)7.04+8.73+12.96(2)8.94+6.8+1.06+13.2(3)4.308+4.298-3.308(4)17-5.47-4.53(5)9.93+7.29-5
(3)4.308+4.298-3.308
(3)原式= 4.308-3.308+4.298 =1+4.298 =5.298
题目简介
用简便算法计算下列各题。(1)7.04+8.73+12.96(2)8.94+6.8+1.06+13.2(3)4.308+4.298-3.308(4)17-5.47-4.53(5)9.93+7.29-5
题目详情
(3)4.308+4.298-3.308
答案
=20+8.73
=28.73
=10+20
=30
(3)原式= 4.308-3.308+4.298
=1+4.298
=5.298
=17-10
=7
= 4+7.29
=11.29
=8.47+0
=8.47
=10+10
=20
=7-1
=6