Tricks for finding the sum of numbers from 1-10
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sum=10/2. × 2(1)+(10-1)(1)
sum=5×11
sum=55
formula=n/2(2a+(n-1)d)
where a is first digit
n is number of terms
d is difference(common)
sum=5×11
sum=55
formula=n/2(2a+(n-1)d)
where a is first digit
n is number of terms
d is difference(common)
aswitha56:
pls mark my answer as brainliest
Then I have one better idea for you
wat
add 9+1,8+2,....... So you can divide 10 by 2 and add the middle number which is 5. Then we get 55
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