题目内容
计算下面各题,能简算的要简算.
25×32×125
87×
×
+
÷
×9+
99×
+
×99
(1-
×80)÷
.
25×32×125
87×
| 3 |
| 86 |
| 5 |
| 7 |
| 7 |
| 24 |
| 1 |
| 5 |
| 4 |
| 5 |
| 2 |
| 5 |
| 2 |
| 5 |
99×
| 2 |
| 7 |
| 5 |
| 7 |
(1-
| 1 |
| 100 |
| 2 |
| 7 |
(1)25×32×125,
=25×(4×8)×125,
=(25×4)×(125×8),
=100×1000,
=100000;
(2)87×
,
=(86+1)×
,
=86×
+1×
,
=3+
,
=3
;
(3)
×
+
÷
,
=
+
,
=
;
(4)
×9+
,
=
×(9+1),
=
×10,
=4;
(5)99×
+
×99,
=99×(
+
),
=99×1,
=99;
(6)(1-
×80)÷
,
=(1-
)×
,
=
×
,
=
.
=25×(4×8)×125,
=(25×4)×(125×8),
=100×1000,
=100000;
(2)87×
| 3 |
| 86 |
=(86+1)×
| 3 |
| 86 |
=86×
| 3 |
| 86 |
| 3 |
| 86 |
=3+
| 3 |
| 86 |
=3
| 3 |
| 86 |
(3)
| 5 |
| 7 |
| 7 |
| 24 |
| 1 |
| 5 |
| 4 |
| 5 |
=
| 5 |
| 24 |
| 1 |
| 4 |
=
| 11 |
| 24 |
(4)
| 2 |
| 5 |
| 2 |
| 5 |
=
| 2 |
| 5 |
=
| 2 |
| 5 |
=4;
(5)99×
| 2 |
| 7 |
| 5 |
| 7 |
=99×(
| 2 |
| 7 |
| 5 |
| 7 |
=99×1,
=99;
(6)(1-
| 1 |
| 100 |
| 2 |
| 7 |
=(1-
| 4 |
| 5 |
| 7 |
| 2 |
=
| 1 |
| 5 |
| 7 |
| 2 |
=
| 7 |
| 10 |
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