题目内容
简便计算.
×
+
×
×
+
÷
9.7×1.25×0.8.
| 2 |
| 3 |
| 4 |
| 15 |
| 2 |
| 3 |
| 11 |
| 15 |
| 7 |
| 4 |
| 5 |
| 8 |
| 1 |
| 4 |
| 8 |
| 5 |
9.7×1.25×0.8.
①
×
+
×
=
×(
+
)
=
×1
=
;
②
×
+
÷
=(
+
)×
=2×
=
;
③9.7×1.25×0.8
=9.7×(1.25×0.8)
=9.7×1
=9.7.
| 2 |
| 3 |
| 4 |
| 15 |
| 2 |
| 3 |
| 11 |
| 15 |
=
| 2 |
| 3 |
| 4 |
| 15 |
| 11 |
| 15 |
=
| 2 |
| 3 |
=
| 2 |
| 3 |
②
| 7 |
| 4 |
| 5 |
| 8 |
| 1 |
| 4 |
| 8 |
| 5 |
=(
| 7 |
| 4 |
| 1 |
| 4 |
| 5 |
| 8 |
=2×
| 5 |
| 8 |
=
| 5 |
| 4 |
③9.7×1.25×0.8
=9.7×(1.25×0.8)
=9.7×1
=9.7.
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