题目内容

计算各题,能简便运算的写出主要过程.
36×(
1
4
+
1
6
+
1
9
1
3
+
1
4
-
1
24
)×24.
0.25×125×32
5
9
×7+
5
9
×11.
(1)36×(
1
4
+
1
6
+
1
9

=36×
1
4
+
1
6
×36+
1
9
×36
=9+6+4
=19;

(2)(
1
3
+
1
4
-
1
24
)×24
=
1
3
×24+
1
4
×24-
1
24
×24
=8+6-1
=13;

(3)0.25×125×32
=0.25×125×(4×8)
=(0.25×4)×(125×8)
=1×1000
=1000;

(4)
5
9
×7+
5
9
×11
=
5
9
×(7+11)
=
5
9
×18
=10.
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