Question

40 to make 77 + 48 easier to solve, lou decides to first add on from 77 to get to the next ten.
+ 3 + 45
← ┼ ┼ ────────────────────────┼→
77 80?
40 add on to get to 80.
77 + 3 = 80

• now, find the sum.

77 + 48
=77 + (3 + 45)
=(77 + 3) + 45
=?

Explanation:

Step1: Calculate 77 + 3

First, we add 77 and 3. $77 + 3 = 80$.

Step2: Calculate 80 + 45

Then, we add the result from Step1 (which is 80) to 45. $80 + 45 = 125$.

Answer:

125