Question

6класс помогите номер 431

Answer 1

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Answer 2

1/2-7/10=5/10-7/10=-2/10
0.75-(-0.20)=0.55
-9.5-3.35=-13.25
6.7+4.32=11.02
-10.3+2.6=-7.7
18.7-20.25=-1.55