题目内容
计算下面各题,能简算的要简算
4050-6300÷42
04×6.5-2.76
175×
+
×175.
13÷(
+
)×
×[
÷(
-
)].
4050-6300÷42
04×6.5-2.76
175×
| 3 |
| 10 |
| 7 |
| 10 |
13÷(
| 1 |
| 4 |
| 5 |
| 6 |
| 3 |
| 4 |
| 8 |
| 15 |
| 5 |
| 6 |
| 7 |
| 9 |
| 1 |
| 3 |
分析:搞清运算顺序:没有括号的,先算乘除,再算加减;有括号的,先算小括号,再算中括号,最后算括号外面的;有些题目灵活运用运算定律进行简便计算.
解答:解:4050-6300÷42,
=4050-150,
=3900;
4×6.5-2.76,
=26-2.76,
=23.24;
175×
+
×175,
=175×(
+
),
=175×1,
=175;
13÷(
+
)×
,
=13÷
×
,
=13×
×
,
=9;
×[
÷(
-
)],
=
×[
÷
],
=
×[
×
],
=
×
,
=1.
=4050-150,
=3900;
4×6.5-2.76,
=26-2.76,
=23.24;
175×
| 3 |
| 10 |
| 7 |
| 10 |
=175×(
| 3 |
| 10 |
| 7 |
| 10 |
=175×1,
=175;
13÷(
| 1 |
| 4 |
| 5 |
| 6 |
| 3 |
| 4 |
=13÷
| 13 |
| 12 |
| 3 |
| 4 |
=13×
| 12 |
| 13 |
| 3 |
| 4 |
=9;
| 8 |
| 15 |
| 5 |
| 6 |
| 7 |
| 9 |
| 1 |
| 3 |
=
| 8 |
| 15 |
| 5 |
| 6 |
| 4 |
| 9 |
=
| 8 |
| 15 |
| 5 |
| 6 |
| 9 |
| 4 |
=
| 8 |
| 15 |
| 15 |
| 8 |
=1.
点评:此题主要利用四则混合运算的顺序:没有括号的,先算乘除,再算加减;有括号的,先算小括号,再算中括号,最后算括号外面的.
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