Monday, December 21, 2009

How do you estimate quotient using compatible numbers for 144 divided by 7?

Let's pick a compatible number close to 7. I'll choose 6.





144 / 6 = 24





Now let's pick another one on the other side of 7. How about 8?





144 / 8 = 18





So, 144 / 7 will be somewhere between 18 and 24. Take a stab at it.





Eryk
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