Khan Academy Unit 4 Test Addition and Subtraction within 20

Front

What is addition?

Back

Addition is the process of finding the total or sum by combining two or more numbers.

Front

What is subtraction?

Back

Subtraction is the process of taking one number away from another.

Front

If you have 6 doves and 19 animals in total, how many rabbits do you have?

Back

You have 13 rabbits.

Front

What does it mean to find the true equation?

Back

Finding the true equation means identifying which mathematical statement is correct.

Front

What is the equation for 3+3?

Back

3+3=6.

Front

If Jack swam 8 laps and swam 6 fewer laps than Lea, how many laps did Lea swim?

Back

Lea swam 14 laps.

Front

How do you arrange 8 acorns in 2 rows?

Back

You can arrange them in 2 rows with 4 acorns in each row.

Front

What is the missing number in the equation 8 = ? - 4?

Back

The missing number is 12.

Front

What is a mathematical equation?

Back

A mathematical equation is a statement that two expressions are equal.

Front

What is the sum of 1 and 4?

Back

The sum of 1 and 4 is 5.