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

Use mental math to evaluate the expression 6(31)+6(4)-6(15)
asked 27.2k views
5 votes
Use mental math to evaluate the expression 6(31)+6(4)-6(15)

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User Brad Zeis
by
7.5k points

2 Answers

3 votes
remember distributive property
a(b+c)=ab+ac
we can ervers it

6(31)+6(4)-6(15)=6(31)+6(4)+6(-15)=6(31+4-15)=6(20)=120
answered
User Martin Matula
by
7.4k points
1 vote
Okay this is how i did it,

6(31) + 6(4) - 6(15)
186 + 24 - 90
= 120
answered
User Damian Helme
by
8.7k points
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