solve :A.)2/5+1/4. B.)7/9-1/3
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Answer: A) 13/20
B)4/9
Step-by-step explanation:a) 2/5 + 1/4 LCM= 20
= [2 x 4 + 1 x 5]/20
= 13/20
b) 7/9 - 1/3 LCM=9
= [ 1 x 7 - 3 x 1] / 9
= 4/9
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