题目内容
| 细心计算噢. 238×5-623 | 103×6+68 |
| 1-
|
(1)238×5-623
=1190-623
=567;
(2)103×6+68
=618+68
=686;
(3)
+
=
=
;
(4)1-
+
=
+
=
.
=1190-623
=567;
(2)103×6+68
=618+68
=686;
(3)
| 2 |
| 7 |
| 1 |
| 7 |
=
| 2+1 |
| 7 |
=
| 3 |
| 7 |
(4)1-
| 2 |
| 5 |
| 1 |
| 5 |
=
| 3 |
| 5 |
| 1 |
| 5 |
=
| 4 |
| 5 |
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