Question

819 Вычислите г)1/4+1/5  д)15/24+3/8  е)7/6+16/18  ж)1/12+ 1/6   з) 1/2 +3/10 

Answer 1

г) 1\4+1\5=0.25+0.20=0.45

д)15\24+3\8=5\8+3\8=1

е) 7\6+16\18=21\18+16\18=37\18=2 1\18

ж) 1\12+1\6=1\12+2\12=3\12=1\4=0.25

з) 1\2+3\10=0.5+0.3=0.8

Answer 2

г)1/4+1/5=5/20+4/20=9/20=0,45

д)15/24+3/8=5/8+3/8=8/8=1

е)7/6+16/18=21/18+16/18=37/18=2 1/18

ж)1/12+1/6=1/12+2/12=3/12=1/4=0,25

з)1/2+3/10=5/10+3/10=8/10=0,8

Answer 3

Давайте вычислим данные суммы:

г) 1/4 + 1/5 = (5/5) * (1/4) + (4/4) * (1/5) = 5/20 + 4/20 = (5 + 4)/20 = 9/20

д) 15/24 + 3/8 = (1/8) * (15/3) + (3/3) * (3/8) = 15/24 + 9/24 = (15 + 9)/24 = 24/24 = 1

е) 7/6 + 16/18 = (3/3) * (7/6) + (2/2) * (16/18) = 21/18 + 32/18 = (21 + 32)/18 = 53/18

ж) 1/12 + 1/6 = (1/12) * (2/2) + (2/2) * (1/6) = 2/24 + 2/12 = (2 + 4)/24 = 6/24 = 1/4

з) 1/2 + 3/10 = (5/10) * (1/2) + (1/10) * (3/3) = 5/10 + 3/10 = (5 + 3)/10 = 8/10 = 4/5

Таким образом: г) 1/4 + 1/5 = 9/20 д) 15/24 + 3/8 = 1 е) 7/6 + 16/18 = 53/18 ж) 1/12 + 1/6 = 1/4 з) 1/2 + 3/10 = 4/5