Number Sense Vocabulary

addend

• Numbers added together to give a sum

• The answer to an addition problem

• The answer to a subtraction problem

Sum

• The answer to a subtraction problem

• The answer to an addition problem.

• The answer to a multiplication problem.

Difference

• The answer to an addition problem.

• The answer to a division problem.

• The answer to a subtraction problem.

Fact Family

• A group of related facts using the same numbers. 2+3=5, 3+2=5, 5-2=3, 5-3=2

• A group of numbers: 2, 4, 6, 8, 10...

• A group of numbers: 3, 13, 23, 33, 43...

Round

• A direction to turn.

• A 2 dimensional shape like a circle.

• To replace a number with another number that tells about how much or how many more. 122 is close to 120.

Estimate

• To give a number or answer that tells about how many or about how much. A good "guess."

• To replace a number with another number that tells about how many or how much.

• To figure out an exact answer by adding, subtracting, multiplying, or dividing.

Equation

• The answer to a math problem.

• Numbers added together to to give a sum.

• A number sentence that uses an equal (=) sign to show that the value to the left is the same as the value to the right. 6+4=10