题目内容
脱式计算.
①(
-
)÷
②[1-(
+
)]÷
③
+
-1.625-2.375+3 ④[
-(
-
)]÷
.
①(
| 1 |
| 2 |
| 3 |
| 8 |
| 3 |
| 4 |
| 1 |
| 4 |
| 3 |
| 8 |
| 1 |
| 4 |
③
| 5 |
| 9 |
| 7 |
| 9 |
| 1 |
| 2 |
| 3 |
| 4 |
| 3 |
| 5 |
| 7 |
| 10 |
分析:根据分数的四则混合运算③进行计算即可得到答案.
解答:解:①(
-
)÷
=
÷
=
;
②[1-(
+
)]÷
=(1-
)÷
=
×4
=1
;
③
+
-1.625-2.375+3
=
-4+3
=
-1
=
;
④[
-(
-
)]÷
=(
-
)÷
=
×
=
.
| 1 |
| 2 |
| 3 |
| 8 |
| 3 |
| 4 |
=
| 1 |
| 8 |
| 3 |
| 4 |
=
| 1 |
| 6 |
②[1-(
| 1 |
| 4 |
| 3 |
| 8 |
| 1 |
| 4 |
=(1-
| 5 |
| 8 |
| 1 |
| 4 |
=
| 3 |
| 8 |
=1
| 1 |
| 2 |
③
| 5 |
| 9 |
| 7 |
| 9 |
=
| 4 |
| 3 |
=
| 4 |
| 3 |
=
| 1 |
| 3 |
④[
| 1 |
| 2 |
| 3 |
| 4 |
| 3 |
| 5 |
| 7 |
| 10 |
=(
| 1 |
| 2 |
| 3 |
| 20 |
| 7 |
| 10 |
=
| 7 |
| 20 |
| 10 |
| 7 |
=
| 1 |
| 2 |
点评:此题主要考查的是分数的四则混合运算.
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