题目内容
用递等式计算 (1)100.1-(2.625+0.425)×30 |
(2)(
|
分析:(1)先算加法,再算乘法,最后算减法;
(2)先算加法和减法,最后算算除法.
(2)先算加法和减法,最后算算除法.
解答:解:(1)100.1-(2.625+0.425)×30
=100.1-3.05×30
=100.1-91.5
=8.6;
(2)(
+
)÷(1-
)
=
×
=
.
=100.1-3.05×30
=100.1-91.5
=8.6;
(2)(
1 |
4 |
3 |
8 |
3 |
10 |
=
5 |
8 |
10 |
7 |
=
25 |
28 |
点评:混合运算的关键是搞清运算顺序,正确按运算顺序计算即可.
练习册系列答案
相关题目