题目内容
①2450-450÷18×25
②
+(
-
)÷
.
②
| 5 |
| 16 |
| 7 |
| 16 |
| 1 |
| 4 |
| 1 |
| 2 |
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:①2450-450÷18×25
=2450-25×25,
=2450-625,
=1825;
②
+(
-
)÷
=
+
÷
,
=
+
,
=
.
=2450-25×25,
=2450-625,
=1825;
②
| 5 |
| 16 |
| 7 |
| 16 |
| 1 |
| 4 |
| 1 |
| 2 |
=
| 5 |
| 16 |
| 3 |
| 16 |
| 1 |
| 2 |
=
| 5 |
| 16 |
| 3 |
| 8 |
=
| 11 |
| 16 |
点评:完成算式②时要细心,注意通分约分.
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