题目内容
仔细一点,这可是容易出错的哟!
①
×56×
②7×30%
③
×6%
④12×(
+
)
⑤4÷4%
①
| 1 |
| 8 |
| 2 |
| 7 |
②7×30%
③
| 1 |
| 6 |
④12×(
| 1 |
| 2 |
| 3 |
| 4 |
⑤4÷4%
分析:混合运算题,如果有括号,要先算括号里面的;如果没有括号,要先算乘除法,再算加减法.
解答:解:①
×56×
,
=7×
,
=2;
②7×30%,
=7×0.3,
=2.1;
③
×6%,
=
×
,
=
;
④12×(
+
),
=12×
,
=15;
⑤4÷4%,
=4÷0.04,
=100.
| 1 |
| 8 |
| 2 |
| 7 |
=7×
| 2 |
| 7 |
=2;
②7×30%,
=7×0.3,
=2.1;
③
| 1 |
| 6 |
=
| 1 |
| 6 |
| 3 |
| 50 |
=
| 1 |
| 100 |
④12×(
| 1 |
| 2 |
| 3 |
| 4 |
=12×
| 5 |
| 4 |
=15;
⑤4÷4%,
=4÷0.04,
=100.
点评:此题关键是弄清运算顺序,仔细计算.
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