题目内容
计算下列各题
+3
+
+1
11
-2
+3
-0.2
25×3
×0.4×
7.8÷[32×(1-
)+3.6].
| 5 |
| 12 |
| 5 |
| 24 |
| 7 |
| 13 |
| 6 |
| 13 |
11
| 2 |
| 7 |
| 4 |
| 5 |
| 5 |
| 7 |
25×3
| 1 |
| 3 |
| 3 |
| 10 |
7.8÷[32×(1-
| 5 |
| 8 |
(1)
+3
+
+1
,
=(
+3
)+(
+1
),
=3
+2,
=5
;
(2)11
-2
+3
-0.2,
=(11
+3
)-(2
+
),
=15-3,
=12;
(3)25×3
×0.4×
,
=25×
×0.4×
,
=(25×0.4)×(
×
),
=10×1,
=10;
(4)7.8÷[32×(1-
)+3.6],
=7.8÷[32×
+3.6],
=7.8÷7.6,
=
,
=1
.
| 5 |
| 12 |
| 5 |
| 24 |
| 7 |
| 13 |
| 6 |
| 13 |
=(
| 10 |
| 24 |
| 5 |
| 24 |
| 7 |
| 13 |
| 6 |
| 13 |
=3
| 5 |
| 8 |
=5
| 5 |
| 8 |
(2)11
| 2 |
| 7 |
| 4 |
| 5 |
| 5 |
| 7 |
=(11
| 2 |
| 7 |
| 5 |
| 7 |
| 4 |
| 5 |
| 1 |
| 5 |
=15-3,
=12;
(3)25×3
| 1 |
| 3 |
| 3 |
| 10 |
=25×
| 10 |
| 3 |
| 3 |
| 10 |
=(25×0.4)×(
| 10 |
| 3 |
| 3 |
| 10 |
=10×1,
=10;
(4)7.8÷[32×(1-
| 7 |
| 8 |
=7.8÷[32×
| 1 |
| 8 |
=7.8÷7.6,
=
| 39 |
| 38 |
=1
| 1 |
| 38 |
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