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The answer to a subtraction problem.

• expression

• sum

• regrouping

• difference

A mathematical process.

(add, subtract, multiply, and divide)

• operation

• difference

• equation

• sum

The result of adding two or more numbers together.

• sum

• equation

• operation

• difference

to rearrange groups in place value to carry out an operation

• difference

• sum

• regrouping

• expression

A mathematical phrase containing only letters and an operation.

• operation

• expression

• sum

• equation

A number sentence that uses the equal sign to show that two expressions are equal.

• operation

• strip diagram

• regrouping

• equation

part - part - whole

• difference

• strip diagram

• sum

• regrouping

12 x 8

• 96

• 69

• 20

• 4

7 x 9

• 63

• 16

• 36

• 2

5 x 3

• 2

• 51

• 8

• 15