问题 解答题
简便计算.
5
9
+
5
6
)×36
7
10
×101
1
5
÷3+
4
5
×
1
3
答案

(1)(

5
9
+
5
6
)×36

=

5
9
×36+
5
6
×36

=20+30

=50;

(2)

7
10
×101

=

7
10
×(100+1)

=

7
10
×100+
7
10
×1

=70+

7
10

=70

7
10

(3)

1
5
÷3+
4
5
×
1
3

=

1
5
×
1
3
+
4
5
×
1
3

=(

1
5
+
4
5
)×
1
3

=1×

1
3

=

1
3

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