问题 解答题
简便计算.
3.72-(1.72+1.3)49×101
1
14
-
9
10
+
13
14
-
1
10
答案

(1)3.72-(1.72+1.3),

=(3.72-1.72)-1.3,

=2-1.3,

=0.7;

(2)49×101,

=49×(100+1),

=4900+49,

=4949;

(3)

1
14
-
9
10
+
13
14
-
1
10

=(

1
14
+
13
14
)-(
9
10
+
1
10
),

=1-1,

=0.

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