题目内容
计算下面各题,能简便计算的请简便计算.
(
+
)÷
+
6.5×0.64-6.5×0.54+6.5×90%
+
-
+
=
(
| 5 |
| 12 |
| 5 |
| 8 |
| 5 |
| 8 |
| 1 |
| 3 |
6.5×0.64-6.5×0.54+6.5×90%
| 4 |
| 7 |
| 1 |
| 5 |
| 3 |
| 7 |
| 4 |
| 5 |
(1)(
+
)÷
+
,
=
×
+
,
=
+
,
=2;
(2)6.5×0.64-6.5×0.54+6.5×90%,
=6.5×0.64-6.5×0.54+6.5×0.9,
=6.5×(0.64-0.54+0.9),
=6.5×1,
=6.5;
(3)
+
-
+
,
=(
-
)+(
+
),
=
+1,
=1
.
| 5 |
| 12 |
| 5 |
| 8 |
| 5 |
| 8 |
| 1 |
| 3 |
=
| 25 |
| 24 |
| 8 |
| 5 |
| 1 |
| 3 |
=
| 5 |
| 3 |
| 1 |
| 3 |
=2;
(2)6.5×0.64-6.5×0.54+6.5×90%,
=6.5×0.64-6.5×0.54+6.5×0.9,
=6.5×(0.64-0.54+0.9),
=6.5×1,
=6.5;
(3)
| 4 |
| 7 |
| 1 |
| 5 |
| 3 |
| 7 |
| 4 |
| 5 |
=(
| 4 |
| 7 |
| 3 |
| 7 |
| 1 |
| 5 |
| 4 |
| 5 |
=
| 1 |
| 7 |
=1
| 1 |
| 7 |
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