题目内容
用递等式计算(注意简算)
+
÷
-
÷[
×(
+
)]
(309×17+375)÷84
3.35×6.4×2+6.7×3.6.
| 2 |
| 5 |
| 1 |
| 9 |
| 8 |
| 9 |
| 3 |
| 8 |
| 8 |
| 49 |
| 9 |
| 8 |
| 1 |
| 8 |
| 3 |
| 7 |
(309×17+375)÷84
3.35×6.4×2+6.7×3.6.
| 2 |
| 5 |
| 1 |
| 9 |
| 8 |
| 9 |
| 3 |
| 8 |
=
| 2 |
| 5 |
| 1 |
| 8 |
| 3 |
| 8 |
=
| 16+5-15 |
| 40 |
=
| 6 |
| 40 |
=
| 3 |
| 20 |
| 8 |
| 49 |
| 9 |
| 8 |
| 1 |
| 8 |
| 3 |
| 7 |
=
| 8 |
| 49 |
| 9 |
| 8 |
| 31 |
| 56 |
=
| 8 |
| 49 |
| 448 |
| 279 |
=
| 3584 |
| 13671 |
(309×17+375)÷84
=(5253+375)÷84
=5628÷84
=67;
3.35×6.4×2+6.7×3.6
=6.7×6.4+6.7×3.6
=(6.4+3.6)×6.7
=10×6.7
=67.
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