This Math quiz is called 'Using Facts to Solve Missing Number Problems' 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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Using facts to solve problems means understanding that subtraction is the inverse of addition, and vise versa. Therefore, if you know that 6 + 4 = 10, you could find the missing number in 10 - ? = 4 by using the same numbers.
This quiz will help your child to solve missing number problems by using number facts known to them.
Can you find the missing number?
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If 4 + 6 = 10, then 10 - 6 = 4
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12 + 8 is a number pair, or bond, to 20
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If 7 + 13 = 20, then 20 - 13 = 7
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20 - 5 = 15, so 15 + 5 = 20
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20 + 80 = 100 so 100 - 80 = 20
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If 45 + 55 = 100, you could solve 100 - 55 = 45
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If you know that 100 - 25 = 75, then you could solve 25 + 75 = 100
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100 - 85 = 15, not 100
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The numbers in each calculation should always be 5, 95 and 100
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16 + 16 = 32, not 100
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