题目内容
计算下面各题,能简算的要简算.
(1)1
×9+1
×17
(2)12
×3.5×
(3)
×1
×
÷
(4)[5
-(0.25+
)×7.2]÷2
(5)(3
-1
)×2
÷4
(6)2
÷[(2
-1.2)×
+0.05].
(1)1
| 5 |
| 13 |
| 5 |
| 13 |
(2)12
| 1 |
| 2 |
| 2 |
| 35 |
(3)
| 5 |
| 16 |
| 1 |
| 3 |
| 3 |
| 5 |
| 2 |
| 15 |
(4)[5
| 4 |
| 15 |
| 1 |
| 3 |
| 4 |
| 5 |
(5)(3
| 5 |
| 6 |
| 3 |
| 4 |
| 2 |
| 5 |
| 1 |
| 2 |
(6)2
| 1 |
| 4 |
| 1 |
| 3 |
| 3 |
| 4 |
(1)1
×9+1
×17
=(9+17)×
,
=26×
,
=36;
(2)12
×3.5×
=
×(3.5×
),
=
×
,
=2.5;
(3)
×1
×
÷
=(
×
)×(
×
),
=
×
,
=1
;
(4)[5
-(0.25+
)×7.2]÷2
=[
-(
+
)×7.2]÷
,
=[
-
×7.2]×
,
=[
-
]×
,
=
×
,
=
;
(5)(3
-1
)×2
÷4
=(
-
)×
÷
,
=(
×
-
×
)×
,
=(
-
)×
,
=5×
,
=1
;
(6)2
÷[(2
-1.2)×
+0.05]
=
÷[(
-
)×
+
],
=
÷[
×
+
],
=
÷[
+
],
=
÷
,
=
×
,
=2.5.
| 5 |
| 13 |
| 5 |
| 13 |
=(9+17)×
| 18 |
| 13 |
=26×
| 18 |
| 13 |
=36;
(2)12
| 1 |
| 2 |
| 2 |
| 35 |
=
| 25 |
| 2 |
| 2 |
| 35 |
=
| 25 |
| 2 |
| 2 |
| 10 |
=2.5;
(3)
| 5 |
| 16 |
| 1 |
| 3 |
| 3 |
| 5 |
| 2 |
| 15 |
=(
| 5 |
| 16 |
| 4 |
| 3 |
| 3 |
| 5 |
| 15 |
| 2 |
=
| 5 |
| 12 |
| 9 |
| 2 |
=1
| 7 |
| 8 |
(4)[5
| 4 |
| 15 |
| 1 |
| 3 |
| 4 |
| 5 |
=[
| 79 |
| 15 |
| 1 |
| 4 |
| 1 |
| 3 |
| 14 |
| 5 |
=[
| 79 |
| 15 |
| 7 |
| 12 |
| 5 |
| 14 |
=[
| 79 |
| 15 |
| 21 |
| 5 |
| 5 |
| 14 |
=
| 16 |
| 15 |
| 5 |
| 14 |
=
| 8 |
| 21 |
(5)(3
| 5 |
| 6 |
| 3 |
| 4 |
| 2 |
| 5 |
| 1 |
| 2 |
=(
| 23 |
| 6 |
| 7 |
| 4 |
| 12 |
| 5 |
| 9 |
| 2 |
=(
| 23 |
| 6 |
| 12 |
| 5 |
| 7 |
| 4 |
| 12 |
| 5 |
| 2 |
| 9 |
=(
| 46 |
| 5 |
| 21 |
| 5 |
| 2 |
| 9 |
=5×
| 2 |
| 9 |
=1
| 1 |
| 9 |
(6)2
| 1 |
| 4 |
| 1 |
| 3 |
| 3 |
| 4 |
=
| 9 |
| 4 |
| 7 |
| 3 |
| 6 |
| 5 |
| 3 |
| 4 |
| 1 |
| 20 |
=
| 9 |
| 4 |
| 17 |
| 15 |
| 3 |
| 4 |
| 1 |
| 20 |
=
| 9 |
| 4 |
| 17 |
| 20 |
| 1 |
| 20 |
=
| 9 |
| 4 |
| 9 |
| 10 |
=
| 9 |
| 4 |
| 10 |
| 9 |
=2.5.
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