试题:
脱式计算.
1.25×2.6×0.8
3
8
×(1.6+2
2
3
)
95.6÷
1
18
+4
2
5
×18.

答案:

我来补答
(1)1.25×2.6×0.8,
=1.25×0.8×2.6,
=1×2.6,
=2.6;

(2)
3
8
×(1.6+2
2
3
),
=
3
8
×1.6+
3
8
×
8
3

=0.6+1,
=1.6;

(3)95.6÷
1
18
+4
2
5
×18,
=95.6×18+4
2
5
×18,
=(95.6+4.4)×18,
=100×18,
=1800.
 
 
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