题目内容
脱式计算(能简算的要简算)
|
| ||||||||||||
|
|
(1)
-
-
,
=
-(
+
),
=
-1,
=
;
(2)
×58+
×41+
,
=
×(58+41+1),
=
×100,
=
;
(3)
×
+40%×
,
=
×
+
×
,
=
×(
+
),
=
×1,
=
;
(4)
÷5+5÷
,
=
+9,
=9
.
| 11 |
| 10 |
| 1 |
| 4 |
| 3 |
| 4 |
=
| 11 |
| 10 |
| 1 |
| 4 |
| 3 |
| 4 |
=
| 11 |
| 10 |
=
| 1 |
| 10 |
(2)
| 1 |
| 8 |
| 1 |
| 8 |
| 1 |
| 8 |
=
| 1 |
| 8 |
=
| 1 |
| 8 |
=
| 25 |
| 2 |
(3)
| 2 |
| 5 |
| 1 |
| 5 |
| 4 |
| 5 |
=
| 2 |
| 5 |
| 1 |
| 5 |
| 2 |
| 5 |
| 4 |
| 5 |
=
| 2 |
| 5 |
| 1 |
| 5 |
| 4 |
| 5 |
=
| 2 |
| 5 |
=
| 2 |
| 5 |
(4)
| 5 |
| 9 |
| 5 |
| 9 |
=
| 1 |
| 9 |
=9
| 1 |
| 9 |
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