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脱式计算.(能用简便方法计算的要用简便方法计算)(1)13.6×3-40.6÷2(2)99×0.75+14×99(3)(56−58)×24(4)121×1001121(5)15÷3−7×(17+121)(6)24623÷6−123.

题目详情
脱式计算.(能用简便方法计算的要用简便方法计算)
(1)13.6×3-40.6÷2 (2)99×0.75+
1
4
×99
(3)(
5
6
5
8
)×24
(4)121×100
1
121
(5)15÷3−7×(
1
7
+
1
21
)
(6)24
6
23
÷6−
1
23
▼优质解答
答案和解析
(1)13.6×3-40.6÷2,
=40.8-20.3,
=20.5;

(2)99×0.75+
1
4
×99,
=99×(0.75+0.25),
=99×1,
=99;

(3)(
5
6
5
8
)×24,
=
5
6
×24-
5
8
×24,
=20-15,
=5;

(4)121×100
1
121

=121×(100+
1
121
),
=121×100+121×
1
121

=12100+1,
=12101;

(5)15÷3−7×(
1
7
+
1
21
),
=15÷3-7×
4
21

=5-1
1
3

=3
2
3


(6)24
6
23
÷6−
1
23

=4
1
23
-
1
23

=4.