find the sum of a) 3 8/7 +2/5 b) -2 1/8 + -6/10 c) -7/13 -(8/15)
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answer :
=3+8 /7 + 2 /5
(find lcd of 8/7 and 2/5 ) LCD = 35
( multiply 35 with 8/7 and 2/5 ) 40 /35 + 14/ 35= 54/ 35
( change answer to mixed fraction ) 54/35=1 19/35
(add 3 to answer ) 3+ 1 +19/35 = 4 19/35
A=4 19/35
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b)
=−2 1/8 − 6/10
= −2−1/8−6/10
Find the LCD of 1/8 and 6/10
lcd=40
(add numerator)−5/40 −24/40 =−29/ 40
(add with whole number )−2 − 29/40 = −2 29/40
B = -2 29/40
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= − 1/195
− 7/13+ 8/15
Find the LCD of 7/13 and 8/15
lcd =195
−105/195 + 104/195= −1/195
C = −1/195
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