题目内容
| 计算下面各题,能简算的要简算. (1)975-384÷16×25 | (2)
| (3)5.25+3
| ||||||||||
(4)
| (5)12.5×0.25×32 | (6)36×(
|
(1)975-384÷16×25
=975-24×25,
=975-600,
=375;
(2)
÷(
+
)+1.65
=
÷(
+
)+1.65,
-
×
+1.65,
=
+1.65,
=0.25+1.65,
=1.9;
(3)5.25+3
-1.8+2
=5.25+3.8-1.8+2.75,
=5.25+2.75+(3.8-1.8),
=8+2,
=10;
(4)
×1.5-1.5×
=(
-
)×1.5,
=3×1.5,
=4.5;
(5)12.5×0.25×32
=12.5×0.25×8×4,
=(12.5×8)×(0.25×4),
=100×1,
=100;
(6)36×(
+
)÷2%
=[36×
+36×
]÷2%,
=[10+8]÷2%,
=18÷2%,
=900.
=975-24×25,
=975-600,
=375;
(2)
| 39 |
| 144 |
| 5 |
| 6 |
| 1 |
| 4 |
=
| 39 |
| 144 |
| 10 |
| 12 |
| 3 |
| 12 |
-
| 39 |
| 144 |
| 12 |
| 13 |
=
| 1 |
| 4 |
=0.25+1.65,
=1.9;
(3)5.25+3
| 4 |
| 5 |
| 3 |
| 4 |
=5.25+3.8-1.8+2.75,
=5.25+2.75+(3.8-1.8),
=8+2,
=10;
(4)
| 96 |
| 17 |
| 45 |
| 17 |
=(
| 96 |
| 17 |
| 45 |
| 17 |
=3×1.5,
=4.5;
(5)12.5×0.25×32
=12.5×0.25×8×4,
=(12.5×8)×(0.25×4),
=100×1,
=100;
(6)36×(
| 5 |
| 18 |
| 2 |
| 9 |
=[36×
| 5 |
| 18 |
| 2 |
| 9 |
=[10+8]÷2%,
=18÷2%,
=900.
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