题目内容
| 下面各题,怎样算简便就怎样算. 11×
|
| ||||||||||
| 2-
|
(1)11×
-11÷
,
=11×
-11×
,
=11×(
-
),
=11×1,
=11;
(2)
×10×
,
=(
×
)×10,
=4×10,
=40;
(3)
÷(
-0.2),
=
÷(
-
),
=
÷(
-
),
=
÷
,
=
×
,
=
;
(4)2-
÷
-
,
=2-
×
-
,
=2-
-
,
=2-(
+
),
=2-2,
=0.
| 11 |
| 4 |
| 4 |
| 7 |
=11×
| 11 |
| 4 |
| 7 |
| 4 |
=11×(
| 11 |
| 4 |
| 7 |
| 4 |
=11×1,
=11;
(2)
| 5 |
| 2 |
| 8 |
| 5 |
=(
| 5 |
| 2 |
| 8 |
| 5 |
=4×10,
=40;
(3)
| 4 |
| 9 |
| 5 |
| 6 |
=
| 4 |
| 9 |
| 5 |
| 6 |
| 1 |
| 5 |
=
| 4 |
| 9 |
| 25 |
| 30 |
| 6 |
| 30 |
=
| 4 |
| 9 |
| 19 |
| 30 |
=
| 4 |
| 9 |
| 30 |
| 19 |
=
| 40 |
| 57 |
(4)2-
| 6 |
| 13 |
| 9 |
| 26 |
| 2 |
| 3 |
=2-
| 6 |
| 13 |
| 26 |
| 9 |
| 2 |
| 3 |
=2-
| 4 |
| 3 |
| 2 |
| 3 |
=2-(
| 4 |
| 3 |
| 2 |
| 3 |
=2-2,
=0.
练习册系列答案
相关题目