Marcus added 34 + 6 + 40 + 2 mentally. _What number was he adding to 34? 34 + ___

Answer 1

The number that Marcus is adding to 34 is the SUM of the other numbers in the equation, 6, 40, 2.

The sum is 6 + 40+ 2 = 48

So 34 + 6 + 40 + 2 is the SAME AS 34 + (6 + 40 + 2)

Hope this helps :)