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Explain how you used mental math
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3 votes
Explain how you used mental math

Explain how you used mental math-example-1
User Agenthost
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6 votes
Addition is the correct answer
User Vishal Chhodwani
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8.7k points
0 votes
Addition, I would use the principles of addition. 
User Lukas Boersma
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7.5k points
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