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Use mental math to evaluate the expression 6(31)+6(4)-6(15)
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Use mental math to evaluate the expression 6(31)+6(4)-6(15)

User Kaolin Fire
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6 votes
Hi

Mental math ? Ok let me explain

6(31) + 6(4) -6(15)
You need to do the parenthesis first
186 + 24 - 90
You do addition first before subtract
210 - 90
= 120

I hope that's help !
User Tim Hockin
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