题目内容
计算题.
(1)(
-
)÷
+
(2)[1-(
+
)]÷
(3)
+
×
(4)0.6×47+52×
+60%
(1)(
| 1 |
| 3 |
| 1 |
| 4 |
| 1 |
| 2 |
| 5 |
| 6 |
(2)[1-(
| 1 |
| 8 |
| 5 |
| 16 |
| 1 |
| 8 |
(3)
| 1 |
| 2 |
| 8 |
| 9 |
| 3 |
| 4 |
(4)0.6×47+52×
| 3 |
| 5 |
考点:整数、分数、小数、百分数四则混合运算,运算定律与简便运算
专题:运算顺序及法则,运算定律及简算
分析:(1)先算括号内的,再算括号外的除法,最后算加法;
(2)先算小括号内的,再算中括号内的,最后算括号外的;
(3)先算乘法,再算加法;
(4)把分数和百分数化为小数,运用乘法分配律简算.
(2)先算小括号内的,再算中括号内的,最后算括号外的;
(3)先算乘法,再算加法;
(4)把分数和百分数化为小数,运用乘法分配律简算.
解答:
解:(1)(
-
)÷
+
=
×2+
=
+
=1
(2)[1-(
+
)]÷
=[1-
]÷
=
×8
=
(3)
+
×
=
+
=
(4)0.6×47+52×
+60%
=0.6×47+52×0.6+0.6
=0.6×(47+52+1)
=0.6×100
=60
| 1 |
| 3 |
| 1 |
| 4 |
| 1 |
| 2 |
| 5 |
| 6 |
=
| 1 |
| 12 |
| 5 |
| 6 |
=
| 1 |
| 6 |
| 5 |
| 6 |
=1
(2)[1-(
| 1 |
| 8 |
| 5 |
| 16 |
| 1 |
| 8 |
=[1-
| 7 |
| 16 |
| 1 |
| 8 |
=
| 9 |
| 16 |
=
| 9 |
| 2 |
(3)
| 1 |
| 2 |
| 8 |
| 9 |
| 3 |
| 4 |
=
| 1 |
| 2 |
| 2 |
| 3 |
=
| 7 |
| 6 |
(4)0.6×47+52×
| 3 |
| 5 |
=0.6×47+52×0.6+0.6
=0.6×(47+52+1)
=0.6×100
=60
点评:注意运算顺序和运算法则,灵活运用所学的运算定律简便计算.
练习册系列答案
相关题目