Break-Apart and Partial Sums Strategies

This video tutorial covers two strategies for solving 2-digit addition problems: the break-apart strategy and the partial sums strategy. The break-apart strategy involves decomposing numbers into tens and ones to simplify addition, while the partial sums strategy focuses on mentally adding tens and ones separately before combining them. Examples are provided to illustrate each method, helping students understand and apply these techniques to find sums efficiently.

What is the main focus of the video tutorial?

• Solving multiplication problems

• Solving 2-digit addition using break-apart and partial sums

• Solving 3-digit addition problems

• Solving subtraction problems

In the break-apart strategy, how is the number 37 divided?

• 30 and 7

• 3 tens and 7 ones

• 37 and 0

• 3 and 37

What is the sum of 30 and 50 in the break-apart strategy?

• 70

• 100

• 80

• 90

In the partial sums strategy, what is the sum of 50 and 20?

• 60

• 70

• 90

• 80

What is the final sum when using the partial sums strategy for the numbers 50 and 20, and 4 and 9?

• 83

• 86

• 84

• 85