1) how do we estimate and adding or subtract decimals? a) finding the approximate nearest value  b) change to a bigger number c) change to a smaller number 2) where do we use adding or subtracting decimals in the real world ? a) in money and measurements. b) it's not useful. c) we use it in sports. 3) why is rounding number and estimation important. a) to make the number easier to work with b) it's not important. c) we can keep the decimal in every calculation. 4) 9.8 is approximately equivalent to 10 ? a) yes b) no 5) if we estimated and added 9.8 by 7.3 the answer will be approximately 18 a) yes b) no 6) if we rounded the number 7.8 to 8 and 2.5 to 3 then we subtracted them the answer will be 5? a) yes b) no

adding and subtracting decimals

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