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

What is the sum of 8 and 6?

Back

14

Front

If a magician pulls out 19 animals and 6 are doves, how many are rabbits?

Back

13 rabbits.

Front

Which equation is true? 1+4=2+2, 3+3=7-1, or 1+1=5-4?

Back

3+3=7-1 is true.

Front

How do you find out how many good witches are there if 1 out of 7 is wicked?

Back

You subtract: 7 - 1 = 6 good witches.

Front

If I picked 2 carrots, 8 onions, and 2 radishes, how many vegetables did I pick?

Back

12 vegetables.

Front

What does the equal sign (=) mean?

Back

The equal sign means that the values on both sides are the same.

Front

What is a number line?

Back

A number line is a straight line with numbers placed at equal intervals, used to represent numbers visually.

Front

What is a word problem in math?

Back

A word problem is a mathematical question presented in the form of a story or real-life scenario.