题目内容
| 脱式计算,注意使用简便方法 ①22+55÷11-
| ②
| ③7.09-
|
(1)22+55÷11-
,
=22+5-
,
=27-
,
=26
;
(2)
+33.5+
-3.5,
=(
+
)+(33.5-3.5),
=1+30,
=31;
(3)7.09-
+12.03-
,
=(7.09+12.03)-(
+
),
=19.12-1,
=18.12.
| 2 |
| 8 |
=22+5-
| 2 |
| 8 |
=27-
| 2 |
| 8 |
=26
| 3 |
| 4 |
(2)
| 1 |
| 7 |
| 6 |
| 7 |
=(
| 1 |
| 7 |
| 6 |
| 7 |
=1+30,
=31;
(3)7.09-
| 5 |
| 12 |
| 7 |
| 12 |
=(7.09+12.03)-(
| 5 |
| 12 |
| 7 |
| 12 |
=19.12-1,
=18.12.
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