题目内容
计算下面各题,能简算的要简算.
(1.5+0.7)×(0.09÷1.8)
÷9+
×
71.2-2.3×1.6-6.32
÷[
×(
+
)].
(1.5+0.7)×(0.09÷1.8)
| 8 |
| 15 |
| 1 |
| 9 |
| 7 |
| 15 |
71.2-2.3×1.6-6.32
| 1 |
| 9 |
| 4 |
| 7 |
| 2 |
| 3 |
| 1 |
| 4 |
(1)(1.5+0.7)×(0.09÷1.8)
=2.2×0.05,
=0.11;
(2)
÷9+
×
=
×
+
×
,
=(
+
)×
,
=1×
,
=
;
(3)71.2-2.3×1.6-6.32
=71.2-3.68-6.32,
=71.2-(3.68+6.32),
=71.2-10,
=61.2;
(4)
÷[
×(
+
)].
=
÷[
×
],
=
÷
,
=
.
=2.2×0.05,
=0.11;
(2)
| 8 |
| 15 |
| 1 |
| 9 |
| 7 |
| 15 |
=
| 8 |
| 15 |
| 1 |
| 9 |
| 1 |
| 9 |
| 7 |
| 15 |
=(
| 8 |
| 15 |
| 7 |
| 15 |
| 1 |
| 9 |
=1×
| 1 |
| 9 |
=
| 1 |
| 9 |
(3)71.2-2.3×1.6-6.32
=71.2-3.68-6.32,
=71.2-(3.68+6.32),
=71.2-10,
=61.2;
(4)
| 1 |
| 9 |
| 4 |
| 7 |
| 2 |
| 3 |
| 1 |
| 4 |
=
| 1 |
| 9 |
| 4 |
| 7 |
| 11 |
| 12 |
=
| 1 |
| 9 |
| 11 |
| 21 |
=
| 7 |
| 33 |
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