Question

a)1/2 -2/5 b) 1/4 - 1/5 c) 3/5 - 2/7 d) 8/9 - 7/15 e) 7/11 - 4/7 f) 19/20 - 13/15 g) 11/18 - 11/30 h) 17/24 - 19/60

Answer 1

Ответ:

a)1/10 b)1/20 c)11/35 d)19/45 e)5/77 f)1/12 h)47/120

Answer 2

Let's simplify each of these subtraction problems:

a) 1/2 - 2/5: To subtract these fractions, you need a common denominator, which is 10 in this case. So:

(5/10) - (4/10) = 1/10

b) 1/4 - 1/5: To subtract these fractions, you need a common denominator, which is 20 in this case. So:

(5/20) - (4/20) = 1/20

c) 3/5 - 2/7: To subtract these fractions, you need a common denominator, which is 35 in this case. So:

(21/35) - (10/35) = 11/35

d) 8/9 - 7/15: To subtract these fractions, you need a common denominator, which is 45 in this case. So:

(40/45) - (21/45) = 19/45

e) 7/11 - 4/7: To subtract these fractions, you need a common denominator, which is 77 in this case. So:

(28/77) - (44/77) = -16/77

f) 19/20 - 13/15: To subtract these fractions, you need a common denominator, which is 60 in this case. So:

(57/60) - (52/60) = 5/60 = 1/12

g) 11/18 - 11/30: To subtract these fractions, you need a common denominator, which is 90 in this case. So:

(55/90) - (33/90) = 22/90 = 11/45

h) 17/24 - 19/60: To subtract these fractions, you need a common denominator, which is 120 in this case. So:

(85/120) - (38/120) = 47/120

So, the simplified results are:

a) 1/2 - 2/5 = 1/10 b) 1/4 - 1/5 = 1/20 c) 3/5 - 2/7 = 11/35 d) 8/9 - 7/15 = 19/45 e) 7/11 - 4/7 = -16/77 f) 19/20 - 13/15 = 1/12 g) 11/18 - 11/30 = 11/45 h) 17/24 - 19/60 = 47/120