If that was 7 x 210 + 18, the answer is 1,488.
If it was 7,210 + 18, then the answer is 7,228.
4/7 + 18/21 = 210/147 or 10/7 or 13/7
180/210 = 18/21 = 6/7
18/35 + 13/42 = 108/210 + 65/210 = 173/210
The Answer is Commutative Property
9*3=27 8*22=176 27 + 7 + 176=210
-18
11
-18
7% of 210 = 14.7 = 7% * 210 = 7%/100% * 210 = 0.07 * 210 = 14.7
1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10 + 11 + 12 + 13 + 14 + 15 + 16 + 17 + 18 + 19 + 20 = 210
they are already even! 7 and 11 are the same as 7 plus 11. 7 plus 11 is 18! 18 is even!
-5+7--4+12 = 18