Q: How do you use compatible numbers to estimate 83 plus 34?

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80+30

330 + 60 = 390

Not in this case.

use compatible numbers to estimate each difference 84-36

31.8966

50.0000.000

230 + 670 = 900

76.8298

ghgfhnhn

5.6261

11

35000 ÷ 70 = 500

You could use 250 and 750.

120

It is most useful for finding quotients because it works with multiples.

609-243=366. 243+366=609

9.3372

352-153

the answer is yes because you can estimate any numbers

420

You use compatible numbers.

say you estimate5.21 x 78.03 you can estimate by the whole number so the 5 stays the same and 78 turns to 80 so it should look like this 5x 80=400 ,so 5.21 x 78.03 =400. SO what i did was use the compatible numbers 5 and 80

230+790

8.0896

54.5

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