4. Subtract the sum of 3/8 and 7/3 from the sum of 4/5 and 7/8.
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Answer:
sum of 3/8 and 7/3
=3/8+7/3(l.c.m=24)
=3×3/24+7×8/24
=9/24+56/24
=65/24
sum of 4/5 and 7/8
=4/5+7/8(l.c.m=40)
=4×8/40+7×5/40
=32/40+35/40
=67/40
subtract 65/24from 67/40
=67/40-65/24(l.c.m=120)
=67×3/120-65×5/120
=201/120-325/120
=(-126/120)
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