А)5/10 + 1/11 б) 3/7+1/4в) 3/5+2/15г) 3/25+2/15Д)3/5-2/5е)11/12-3/4ж)5/8-5/9з)5/21-3/28

Question

Математика: А)5/10 + 1/11 б) 3/7+1/4в) 3/5+2/15г) 3/25+2/15Д)3/5-2/5е)11/12-3/4ж)5/8-5/9з)5/21-3/28​

elvinabilalova · Answer

а) 5/10 + 1/11 = 55/110 + 10/110 = 65/110 = 13/22

б) 3/7 + 1/4 = 12/28 + 7/28 = 19/28

в) 3/5 + 2/15 = 9/15 + 2/15 = 11/15

г) 3/25 + 2/15 = 9/75 + 10/75 = 19/75

д) 3/5 - 2/5 = 1/5

е) 11/12 - 3/4 = 11/12 - 9/12 = 2/12 = 1/6

ж) 5/8 - 5/9 = 45/72 - 40/72 = 5/72

з) 5/21 - 3/28 = 20/84 - 9/84 = 11/84

А)5/10 + 1/11 б) 3/7+1/4
в) 3/5+2/15
г) 3/25+2/15
Д)3/5-2/5
е)11/12-3/4
ж)5/8-5/9
з)5/21-3/28