10 + 2 - 6 = 6
26
16
It is an equation and the value of x works out as 88
4x = -36 x = -9
15x26=390
To add 26 and 17 using the common core method with mental math, you can break the numbers into tens and ones. First, add the tens: 20 (from 26) plus 10 (from 17) equals 30. Next, add the ones: 6 (from 26) plus 7 (from 17) equals 13. Finally, combine the two results: 30 plus 13 equals 43. Thus, 26 plus 17 equals 43.
How about 20 plus 6 equals 26 as one example
so 26 = 4r so r = 6½
572 Because 2x11=22 and 13x2=26 and 22x26=572.
10 ( x = -3)
n = 26
26 + 8 = 34