题目内容
脱式计算
①1口÷
| ②（9×
| ③
| ④（
|
①10÷
+
×4，
=18+
，
=18
；
②（9×
-
）÷
，
=（
-
）÷
，
=
÷
，
=0.5；
③
×[1-（
-
）]，
=
×[1-
]，
=
×
，
=
；
④（
+
）×
÷
，
=
×
÷
，
=
÷
，
=
．
| 5 |
| 9 |
| 1 |
| 6 |
=18+
| 7 |
| 3 |
=18
| 7 |
| 3 |
②（9×
| 5 |
| 6 |
| 73 |
| 10 |
| 7 |
| 5 |
=（
| 15 |
| 7 |
| 73 |
| 10 |
| 7 |
| 5 |
=
| 1 |
| 5 |
| 7 |
| 5 |
=0.5；
③
| 4 |
| 79 |
| 3 |
| 4 |
| 3 |
| 8 |
=
| 4 |
| 79 |
| 3 |
| 8 |
=
| 4 |
| 79 |
| 5 |
| 8 |
=
| 5 |
| 58 |
④（
| 5 |
| 6 |
| 7 |
| 9 |
| 4 |
| 5 |
| 19 |
| 70 |
=
| 19 |
| 18 |
| 4 |
| 5 |
| 19 |
| 70 |
=
| 76 |
| 90 |
| 19 |
| 70 |
=
| 8 |
| 9 |
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