问题 解答题
计算下列各题.
4
9
×
3
7
+
4
9
÷
7
4
(简算)
12.5×0.32×2.5(简算)
4.8×(11.08-15.6÷7.5)
3
4
-
2
3
)÷
2
3
×
1
6
答案

(1)

4
9
×
3
7
+
4
9
÷
7
4

=

4
9
×
3
7
+
4
9
×
4
7

=(

3
7
+
4
7
)×
4
9

=1×

4
9

=

4
9

(2)12.5×0.32×2.5,

=12.5×0.8×0.4×2.5,

=(12.5×0.8)×(0.4×2.5),

=10×1,

=10;

(3)4.8×(11.08-15.6÷7.5),

=4.8×(11.08-2.08),

=4.8×9,

=43.2;

(4)(

3
4
-
2
3
)÷
2
3
×
1
6

=(

9
12
-
8
12
)×
3
2
×
1
6

=

1
12
×
1
4

=

1
48

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