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Why do you add a zero when multiplying two digit by two digit numbers?
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5 votes
Why do you add a zero when multiplying two digit by two digit numbers?

User Mpho
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Place the zero to hold the ten's place 
User Prashan
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6.9k points
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It helps align the problem right. There is nothing to multiply there, so you have put a 0 or you'll get confused on what to do next. 
User Sinaesthetic
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