Math, asked by mayangmenla, 1 month ago

Q2.Without adding, find the sum:
a) 1+3+5+7+9
b) 1+3+5+7+9+11+13+15+17+19

Answers

Answered by friends1664

2

ok

Answer:

a) 9+1 ÷2= 5 and then 5^2

answer =25 ✅

b) 19+1 ÷2 = 10 and then 10^2

answer =100 ✅

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