试题:
1.5-0.7= 0.37+0.63= 56×0.1=
5.1+3= 0.18+0.1= 280-285=
3×3.1= 5.6×2= 5×0.06=

答案:

我来补答
1.5-0.7=0.8, 0.37+0.63=1, 56×0.1=5.6,
5.1+3=8.1, 0.18+0.1=0.28, 280-285=-5,
3×3.1=9.3, 5.6×2=11.2, 5×0.06=0.3.
 
 
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