Loading…
Example 1.12 from Prealgebra, 1.2 Add Whole Numbers
Add Whole Numbers: example 1.12
Model the addition
Work it out on paper first. Then open the solution one step at a time, and stop as soon as you can finish on your own.
Solution
means the sum of and
Each addend is less than 10, so we can use ones blocks.
Model the first number with 2 blocks. Model the second number with 6 blocks. Count the total number of blocks
There are blocks in all, so
Your turn
The book's Try It right after this example: same idea, new numbers. Only the answer is given.
Model:
How did it go?