9
12
the number is 11
Start by setting up an equation. Use x for the integer. The equation would be: x/-3=12+-20 Find the sum of 12 and -20 which is -8. Therefore the equation would now be: x/-3=-8 Multiply -8 by -3 which equals 24. Therefore x=24 Plug it back into the equation to check that it works: 24/-3=12+-20 24/-3=-8 -8=-8 Thefore 24 is the integer that when divided by -3 it equals the sum of 12 and -20.
12
12
9
SUM
12
12 and 3 10 and 5 three fives five threes fifteen ones
Examples: 111, 1+1+1=3; 12, 1+2=3; 30, 3+0=3.
215
1/6 + 2/3 +1/4 is the same as 2/12 + 8/12 + 3/12 Which is 13/12 and this equals 1 & 1/12