题目内容
计算下面各题,能简便的简便.不简算答对扣2分.
15÷
+
×8
5x-3
=25
×
÷
÷23+
×
.
15÷
| 5 |
| 9 |
| 1 |
| 6 |
5x-3
| 3 |
| 4 |
| 8 |
| 9 |
| 3 |
| 4 |
| 8 |
| 15 |
| 8 |
| 17 |
| 1 |
| 23 |
| 9 |
| 17 |
(1)15÷
+
×8,
=27+1
,
=28
;
(2)5x-3
=25,
5x=25+3
,
5x=28
,
x=
;
(3)
×
÷
,
=
×
,
=
;
(4)
÷23+
×
,
=(
+
)×
,
=
.
| 5 |
| 9 |
| 1 |
| 6 |
=27+1
| 1 |
| 3 |
=28
| 1 |
| 3 |
(2)5x-3
| 3 |
| 4 |
5x=25+3
| 3 |
| 4 |
5x=28
| 3 |
| 4 |
x=
| 23 |
| 4 |
(3)
| 8 |
| 9 |
| 3 |
| 4 |
| 8 |
| 15 |
=
| 2 |
| 3 |
| 15 |
| 8 |
=
| 5 |
| 4 |
(4)
| 8 |
| 17 |
| 1 |
| 23 |
| 9 |
| 17 |
=(
| 8 |
| 17 |
| 9 |
| 17 |
| 1 |
| 23 |
=
| 1 |
| 23 |
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