Question

Решите пж 8/15+3/10=,4/9+1/6=,3/8+3/10=,4/25+9/10=,5/12+4/15

Answer 1

8/15 + 3/10=16/30+ 9/30=25/30=5/6
4/9+1/6=8/18+3/18=11/18
3/8+3/10=15/40+12/40=27/40
4/25+9/10=8/50+45/50=53/55
5/12+4/15=25/60+16/60=41/60

Answer 2

1) 8/15 + 3/10 = (8*10 + 3*15) / (15*10) = (80 + 45) / 150 = 125 / 150 = 5/6

2) 4/9 + 1/6 = (4*6 + 1*9) / (9*6) = (24 + 9) / 54 = 33 / 54 = 11/18

3) 3/8 + 3/10 = (3*10 + 3*8) / (8*10) = (30 + 24) / 80 = 54 / 80 = 27/40

4) 4/25 + 9/10 = (4*10 + 9*25) / (25*10) = (40 + 225) / 250 = 265 / 250 = 53/50

5) 5/12 + 4/15 = (5*15 + 4*12) / (12*15) = (75 + 48) / 180 = 123 / 180 = 41/60