题目内容
3÷
| 4
| 18÷12
| ||||||||||||||||||
1
| 2.4×2
| 1
|
(1)3÷
-
÷3+3
,
=4-
+3
,
=7
;
(2)4
-2
×
,
=4
-
,
=3
;
(3)18÷12
×2
÷
,
=18×
×
×21,
=66
;
(4)1
÷12+
×
,
=1
×
+
×
,
=(1
+
)×
,
=2×
,
=
;
(5)2.4×2
×
,
=2.4×
×
,
=0.8;
(6)1
÷(3
÷1
),
=1
÷3,
=
.
| 3 |
| 4 |
| 3 |
| 4 |
| 3 |
| 4 |
=4-
| 1 |
| 4 |
| 3 |
| 4 |
=7
| 1 |
| 2 |
(2)4
| 1 |
| 5 |
| 3 |
| 5 |
| 5 |
| 12 |
=4
| 1 |
| 5 |
| 13 |
| 12 |
=3
| 7 |
| 60 |
(3)18÷12
| 3 |
| 5 |
| 2 |
| 9 |
| 1 |
| 21 |
=18×
| 5 |
| 63 |
| 20 |
| 9 |
=66
| 2 |
| 3 |
(4)1
| 5 |
| 7 |
| 2 |
| 7 |
| 1 |
| 12 |
=1
| 5 |
| 7 |
| 1 |
| 12 |
| 2 |
| 7 |
| 1 |
| 12 |
=(1
| 5 |
| 7 |
| 2 |
| 7 |
| 1 |
| 12 |
=2×
| 1 |
| 12 |
=
| 1 |
| 6 |
(5)2.4×2
| 1 |
| 12 |
| 4 |
| 25 |
=2.4×
| 25 |
| 12 |
| 4 |
| 25 |
=0.8;
(6)1
| 2 |
| 3 |
| 1 |
| 2 |
| 1 |
| 6 |
=1
| 2 |
| 3 |
=
| 5 |
| 9 |
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