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
编辑:chaxungu时间:2026-04-27 13:34:03分类:小学数学题库
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+7.29-5.93 | (6)8.47-4.397+4.397 | | (7)6.87+2.8+3.13+7.2 | (8)7-0.715-0.285 |
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(1)原式=7.04+12.96+8.73 =20+8.73 =28.73 | (2)原式=8.94+1.06+(6.8+13.2) =10+20 =30 |
(3)原式= 4.308-3.308+4.298 =1+4.298 =5.298 | (4)原式=17-(5.47+4.53) =17-10 =7 |
(5)原式=9.93-5.93+7.29 = 4+7.29 =11.29 | (6)原式=8.47+(4.397-4.397) =8.47+0 =8.47 |
(7)原式=6.87+3.13+(2.8+7.2) =10+10 =20 | (8)原式=7-(0.715+0.285) =7-1 =6 |