题目内容
(2012?西充县模拟)
用递等式计算: 1498+1068÷89 |
132.5-18÷4.5+7.6 | 12×(
|
分析:本题根据四则混合运算的运算顺序计算即可:先算乘除,再算加减,有括号的要先算括号里面的.
解答:解:1498+1068÷89
=1498+12,
=1510;
132.5-18÷4.5+7.6
=132.5-4.5+7.6,
=128+7.6,
=135.6;
12×(
-
)÷
=12×
÷
,
=1÷
,
=2.
=1498+12,
=1510;
132.5-18÷4.5+7.6
=132.5-4.5+7.6,
=128+7.6,
=135.6;
12×(
5 |
6 |
3 |
4 |
1 |
2 |
=12×
1 |
12 |
1 |
2 |
=1÷
1 |
2 |
=2.
点评:在用递等式计算时,要注意计算过程的完整性,中间不要有太大跳跃.
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