find the missing number 8-4-9 14-5-2 18-1-blank?
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need to find the missing number 8(7+23)=8(7)+8( )
The answer depends on what number is missing and what numbers are known!
none
With only one number, you cannot - unless that one number happens to be the measure of the missing angle!
you find out missing numbers in addition by subtracting the numbers that are writen