Unit 3 Everyday math

Front

What is the missing number in the equation: ? + 7 = 12?

Back

5

Front

What addition fact can help you solve the subtraction problem 18 - 9?

Back

9 + 9 = 18

Front

What number should replace the question mark in the equation: ? + 5 = 20?

Back

15

Front

In the game Salute!, if the dealer says 14 and Player A has a 10, what number does Player A have?

Back

4

Front

What is the result of the subtraction: 5 - 0?

Back

5

Front

What is the principle of finding a missing addend in an equation?

Back

To find a missing addend, subtract the known addend from the total.

Front

How do you solve the equation: ? + 9 = 15?

Back

Subtract 9 from 15 to find the missing number, which is 6.

Front

What is the relationship between addition and subtraction?

Back

Addition and subtraction are inverse operations; one can be used to check the other.

Front

What is the result of 10 - 3?

Back

7

Front

If you know that 8 + ? = 20, how do you find the missing number?

Back

Subtract 8 from 20 to find the missing number, which is 12.