题目内容

计算下面各题,能简算的要简算.
(1)975-384÷16×25
(2)
39
144
÷(
5
6
+
1
4
)+1.65
(3)5.25+3
4
5
-1.8+2
3
4
(4)
96
17
×1.5-1.5×
45
17
(5)12.5×0.25×32(6)36×(
5
18
+
2
9
)÷2%
(1)975-384÷16×25
=975-24×25,
=975-600,
=375;

(2)
39
144
÷(
5
6
+
1
4
)+1.65
=
39
144
÷(
10
12
+
3
12
)+1.65,
-
39
144
×
12
13
+1.65,
=
1
4
+1.65,
=0.25+1.65,
=1.9;

(3)5.25+3
4
5
-1.8+2
3
4

=5.25+3.8-1.8+2.75,
=5.25+2.75+(3.8-1.8),
=8+2,
=10;

(4)
96
17
×1.5-1.5×
45
17

=(
96
17
-
45
17
)×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×(
5
18
+
2
9
)÷2%
=[36×
5
18
+36×
2
9
]÷2%,
=[10+8]÷2%,
=18÷2%,
=900.
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