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Q: When people say Estimate each answer using compatible numbers what do they mean?

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Estimate 43/81 by using compatible numbers

The best way to estimate a quotient using compatible numbers is to first understand how compatible numbers work. They are numbers that are close in value to the actual numbers and are easily added, subtracted or divided.

i think it is 28x26

94

300 + 60

23.3043

119.3333

70.013

77

280 + 500 = 780

2.6952

100+500=600

4.9048

6.9877

That equals 559. If you have to, estimate 210 + 350 = 560

568-342 using compatible numbers = 226

0.0563

Not in this case.

535.6 divided by 35 using compatible numbers = 15.302857142857144

720/8 = 90

1800

If you know the number is 7128 I do not understand why on earth anyone would want to estimate it!

9 + 63 = 72 lbs.

Compatible numbers would be easier. Rounding gives you 14 x 47. Compatible numbers could be 13 x 50 which would be closer to the actual product.

Ha, made you look