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计算,能简便的用简便方法算.1650-480÷16×150.4×7.6×25×1000(34+25)×2079÷135+29×513.

题目详情
计算,能简便的用简便方法算.
1650-480÷16×15 0.4×7.6×25×1000
3
4
+
2
5
)×20
7
9
÷
13
5
+
2
9
×
5
13
▼优质解答
答案和解析
(1)1650-480÷16×15,
=1650-30×15,
=1650-450,
=1200;

(2)0.4×7.6×25×1000,
=(0.4×25)×(7.6×1000),
=10×7600,
=76000;

(3)(
3
4
+
2
5
)×20,.
=
3
4
×20+
2
5
×20,
=15+8,
=23;

(4)
7
9
÷
13
5
+
2
9
×
5
13

=
7
9
×
5
13
+
2
9
×
5
13

=(
7
9
+
2
9
)×
5
13

=1×
5
13

=
5
13