HOW TO MULTIPLY TWO-DIGIT NUMBERS. MENTAL CALCULATION

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Matemáticas con Juan

Published on Apr 22, 2023
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Mental calculation technique for multiplying two-digit numbers, specifically numbers ranging from 11 to 19. Any number between 11 and 19 can be written in the form 10+a. So, the product (10+a)(10+b) can be understood as 100+10(a+b)+ab. This is what we use to do the multiplication. #math #mathwithjuan #mentalcalculation

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