题目内容
| 下面各题,怎样简便就怎样算. 12÷0.4÷
|
| ||||||||||||||||
| 24×(
| ||||||||||||||||
80×
| 1.8×
|
(1)12÷0.4÷
,
=30÷
,
=40;
(2)
÷9+
×
,
=
×
+
×
,
=
×(
+
),
=
×
,
=
;
(3)
÷[(
-
)+(
-
)],
=
÷[
+
],
=
÷
,
=
;
(4)24×(
+
+
),
=24×
+24×
+24×
,
=9+4+10,
=23;
(5)80×
÷
×
,
=80×
×800×
,
=(80×
)×(800×
),
=10×1,
=10;
(6)1.8×
+1.2×
-
,
=(1.8+1.2-1)×
,
=2×
,
=
.
| 3 |
| 4 |
=30÷
| 3 |
| 4 |
=40;
(2)
| 5 |
| 17 |
| 1 |
| 9 |
| 5 |
| 17 |
=
| 5 |
| 17 |
| 1 |
| 9 |
| 1 |
| 9 |
| 5 |
| 17 |
=
| 1 |
| 9 |
| 5 |
| 17 |
| 5 |
| 17 |
=
| 1 |
| 9 |
| 10 |
| 17 |
=
| 10 |
| 153 |
(3)
| 4 |
| 9 |
| 5 |
| 6 |
| 1 |
| 2 |
| 5 |
| 9 |
| 5 |
| 18 |
=
| 4 |
| 9 |
| 1 |
| 3 |
| 5 |
| 18 |
=
| 4 |
| 9 |
| 11 |
| 18 |
=
| 8 |
| 11 |
(4)24×(
| 3 |
| 8 |
| 1 |
| 6 |
| 5 |
| 12 |
=24×
| 3 |
| 8 |
| 1 |
| 6 |
| 5 |
| 12 |
=9+4+10,
=23;
(5)80×
| 1 |
| 8 |
| 1 |
| 800 |
| 1 |
| 800 |
=80×
| 1 |
| 8 |
| 1 |
| 800 |
=(80×
| 1 |
| 8 |
| 1 |
| 800 |
=10×1,
=10;
(6)1.8×
| 3 |
| 4 |
| 3 |
| 4 |
| 3 |
| 4 |
=(1.8+1.2-1)×
| 3 |
| 4 |
=2×
| 3 |
| 4 |
=
| 3 |
| 2 |
练习册系列答案
相关题目