题目内容
脱式计算．（能简算的要简算）
①14×75-624÷39
②
÷9+
×
③
+（
-
）÷
④
÷[
-（1-
）]．
①14×75-624÷39
②
| 5 |
| 7 |
| 4 |
| 7 |
| 1 |
| 9 |
③
| 2 |
| 3 |
| 5 |
| 6 |
| 3 |
| 4 |
| 3 |
| 8 |
④
| 7 |
| 11 |
| 2 |
| 5 |
| 7 |
| 10 |
①14×75-624÷39
=1050-16，
=1034；
②
÷9+
×
=
×
+
×
，
=（
+
）×
，
=
×
，
=
；
③
+（
-
）÷
=
+
×
，
=
+
，
=
；
④
÷[
-（1-
）]．
=
÷[
-
]，
=
÷
，
=
．
=1050-16，
=1034；
②
| 5 |
| 7 |
| 4 |
| 7 |
| 1 |
| 9 |
=
| 5 |
| 7 |
| 1 |
| 9 |
| 4 |
| 7 |
| 1 |
| 9 |
=（
| 5 |
| 7 |
| 4 |
| 7 |
| 1 |
| 9 |
=
| 9 |
| 7 |
| 1 |
| 9 |
=
| 1 |
| 7 |
③
| 2 |
| 3 |
| 5 |
| 6 |
| 3 |
| 4 |
| 3 |
| 8 |
=
| 2 |
| 3 |
| 1 |
| 12 |
| 8 |
| 3 |
=
| 2 |
| 3 |
| 2 |
| 9 |
=
| 8 |
| 9 |
④
| 7 |
| 11 |
| 2 |
| 5 |
| 7 |
| 10 |
=
| 7 |
| 11 |
| 2 |
| 5 |
| 3 |
| 10 |
=
| 7 |
| 11 |
| 1 |
| 10 |
=
| 70 |
| 11 |
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