计算下面各题(能简算的要简算).1.25×32×0.251.8×14+2.2×25% &nbsp...

2024-11-13 03:48:10
推荐回答(1个)
回答(1):

(1)1.25×32×0.25
=1.25×8×4×0.25
=(1.25×8)×(4×0.25)
=10×1
=10

(2)1.8×

1
4
+2.2×25%  
=1.8×
1
4
+2.2×
1
4
  
=(1.8+2.2)×
1
4
  
=4×
1
4
  
=1

(3)[1-(
1
2
-
1
4
)]×
2
3

=[1-
1
4
2
3

=
3
4
×
2
3

=
1
2


(4)12×[(
11
6
-
2
3
)×3]
=12×[
7
6
×3]
=12×
7
2

=42