问题 解答题
直接写出计算结果:
125×25×32=
4.9×5
1
2
+4.9+3
1
2
×4.9
=
29×
17
28
=
(0.12×40+13×0.4)-
3
4
-25
=
答案

(1)125×25×32,

=125×25×(4×8),

=(125×8)×(25×4),

=1000×100,

=100000;

(2)4.9×5

1
2
+4.9+3
1
2
×4.9,

=4.9×(5

1
2
+1+3
1
2
),

=4.9×10,

=49;

(3)29×

17
28

=(28+1)×

17
28

=

17
28
×28+1×
17
28

=17+

17
28

=17

17
28

(4)(0.12×40+13×0.4)-

3
4
-25,

=(12+13)×0.4-

3
4
-25,

=10-0.75-25,

=-15.75.

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