Question

помогите 50 балов даю​

Answer 1

Ответ:

Пошаговое объяснение:

1) 0,7 + 1/7= 7/10 + 1/7= 49/70 + 10/70= 59/70

2) 7/16 - 0,12= 7/16 - 6/50= 175/400 -48/400= 127/400

3) 4,85 - 2 13/24 = 4 17/20 -61/24= 97/20 - 61/24= 582/120 - 305/120= = =277/120 = 2 37/120

4) 7 8/21 - 6,375= 149/21 - 6 15/40 = 149/20 - 255/40= 298/40 - 255/40=  43/40 = 1 3/40