题目内容
计算下面各题
(1)1.29×35-(4.28+0.86)
(2)
+
×
+
.
(1)1.29×35-(4.28+0.86)
(2)
| 1 |
| 7 |
| 6 |
| 7 |
| 5 |
| 8 |
| 3 |
| 8 |
分析:(1)先算乘法和括号内的,再算减法;
(2)先算乘法,再算加法.
(2)先算乘法,再算加法.
解答:解:(1)1.29×35-(4.28+0.86),
=45.15-5.14,
=40.01;
(2)
+
×
+
,
=
+
+
,
=
+
+
,
=
.
=45.15-5.14,
=40.01;
(2)
| 1 |
| 7 |
| 6 |
| 7 |
| 5 |
| 8 |
| 3 |
| 8 |
=
| 1 |
| 7 |
| 15 |
| 28 |
| 3 |
| 8 |
=
| 8 |
| 56 |
| 30 |
| 56 |
| 21 |
| 56 |
=
| 59 |
| 56 |
点评:掌握运算顺序和运算法则,是解答此题的关键.
练习册系列答案
相关题目