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1-1 est. strategies

I couldn't fit estimation, that's what the est. is for.

How do you use front- end estimation? (decimals) You add the front- end digit first, then you estimate the back digits to ether a full number, or nothing then you add the full numbers to the front- end digits.
How do you use compatible numbers? First you set up the quotient, then chose compatible numbers, then simplify.
How do you estimate a sum or difference? First you round to the nearest whole number, then you solve it. (example: 3.27- 0.88 3.27 = 3 0.88=1 so 3-1=2)
Created by: peas on earth