This Math quiz is called 'Number Bonds to 20' and it has been written by teachers to help you if you are studying the subject at elementary school. Playing educational quizzes is a fun way to learn if you are in the 1st or 2nd grade - aged 6 to 8.
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As part of learning about addition and subtraction, children in their first year of elementary school will learn about pairs of numbers which add together to make twenty. These are known as number bonds to twenty and are useful when calculating quickly. Once the addition facts, or number bonds, are learned by heart, children may then learn the associated subtraction facts. For example, if 17 + 3 = 20, then 20 - 3 = 17 or 20 - 17 = 3.
Do you know your number bonds to 20?