Bonds, number bonds: find the missing number

The name is Bond, Number Bond. And it's here to help us solve math problems! In this lesson, students are introduced to another strategy for problem solving: number bonds. Number bonds are useful when finding the unknown number in a problem, such as 8 + ? = 11. They can be used for addition and subtraction, similar to fact families. Just remember they are shaken, not stirred.

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Math Tricks - 1st grade