题目内容

看谁都能算对!(能简算的请写出简算过程)
75÷8+24×12.5%+
1
8

2×3.14×8+3.14×82
24×
51
43
+51×
19
43

9
20
×[
1
2
×(
2
5
+
4
5
)]
解;(1)75÷8+24×12.5%+
1
8

=(75+24+1)×
1
8

=100×
1
8

=12.5;

(2)2×3.14×8+3.14×82,
=3.14×16+3.14×64,
=3.14×(16+64),
=3.14×80,
=251.2;

(3)24×
51
43
+51×
19
43

=24×
51
43
+19×
51
43

=(24+19)×
51
43

=43×
51
43

=51;

(4)
9
20
×[
1
2
×(
2
5
+
4
5
)]

=
9
20
×[
1
2
×
6
5
]

=
9
20
×
3
5

=
27
100
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