Add all the 1's except the last one, since 1 x 0 = 0. If you want to do all the additions first (this should be indicated by proper placing of parentheses), then the result is zero, since anything times zero = zero. In this case, you don't actually have to carry out the addition.
(2n + 1)^2 -1
13+12=25 1+3+1+2=7
2 and definetly not 11.
3
1 4/5 + 1/5 = 5/5 = 1
The sum of 15/16 and 1/4 is 1 3/16
1 millimetre is equak to one thousandths of a metre.
6/3
equilateral triangle
greater than
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