题目内容
选择合理的方法计算:
12×(
+
)
-
×
:
(化简比)
(
+
)÷
.
12×(
| 2 |
| 3 |
| 1 |
| 6 |
| 21 |
| 32 |
| 7 |
| 10 |
| 5 |
| 16 |
| 2 |
| 3 |
| 1 |
| 4 |
(
| 7 |
| 8 |
| 13 |
| 16 |
| 13 |
| 16 |
(1)12×(
+
)
=12×
+12×
=8+2
=10
(2)
-
×
=
-
=
(3)
:
=(
×12):(
×12)
=8:3
(4)(
+
)÷
=(
+
)×
=
×
+
×
=
+1
=2
| 2 |
| 3 |
| 1 |
| 6 |
=12×
| 2 |
| 3 |
| 1 |
| 6 |
=8+2
=10
(2)
| 21 |
| 32 |
| 7 |
| 10 |
| 5 |
| 16 |
=
| 21 |
| 32 |
| 7 |
| 32 |
=
| 7 |
| 16 |
(3)
| 2 |
| 3 |
| 1 |
| 4 |
=(
| 2 |
| 3 |
| 1 |
| 4 |
=8:3
(4)(
| 7 |
| 8 |
| 13 |
| 16 |
| 13 |
| 16 |
=(
| 7 |
| 8 |
| 13 |
| 16 |
| 16 |
| 13 |
=
| 7 |
| 8 |
| 16 |
| 13 |
| 13 |
| 16 |
| 16 |
| 13 |
=
| 14 |
| 13 |
=2
| 1 |
| 13 |
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