A number bond is a simple addition of two numbers that add up to give the sum. Using number bonds, one can instantly tell the answer without the need for the actual calculation. In the example given we can see that when we see a number bond, we instantly know the answer, without having to calculate. 

Math Module 4 Lesson 1  

Lesson Goal: 

• identify parts & whole in a number bond

• model composition and decomposition of numbers to 5 using actions, objects, and drawings

Completed Problem Set

Lesson Goal: I can model decompositions of 6–8 using linking cube sticks to see patterns.

Lesson Goal: I can write result unknown number sentences, boxing the unknown. I can solve add to with result unknown word problems to 8 with equations. 

Lesson Goal:  I can represent subtraction story problems using objects, drawings, expressions, and equations