问题 解答题
下面各题怎样简便就怎样计算
①5.02-1.37-2.63
12
5
×(
5
6
+
1
2
)+0.8
③1.25×2.5×32
④11÷〔
6
11
×(
3
4
+
1
6
)〕
答案

①5.02-1.37-2.63

=5.02-(1.37+2.63)

=5.02-4

=1.02;

12
5
×(
5
6
+
1
2
)+0.8

=

12
5
×
5
6
+
12
5
×
1
2
+0.8

=2+1.2+0.8

=4;

③1.25×2.5×32

=1.25×2.5×(8×4)

=(1.25×8)×(2.5×4)

=10×10

=100;

④11÷〔

6
11
×(
3
4
+
1
6
)〕

=11÷[

6
11
×
9+2
12
]

=11÷

1
2

=11×2

=22.

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