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I think you round it to the nearest whole number...

Q: How do you estimate sums with decimals?

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In the same way as you estimate them for whole numbers.

To divide decimals the partial sums method requires that numbers are separated into individual portions. The separated numbers are then solved in long division until eliminated.

you have to add

68

The basic idea is the same as when you estimate sums and differences of larger numbers (which may or may not be integers). You round the numbers to one or two decimal digits, then add them up.

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In the same way as you estimate them for whole numbers.

To divide decimals the partial sums method requires that numbers are separated into individual portions. The separated numbers are then solved in long division until eliminated.

decimals must be estimates unless they have multiples of 2 or 5 in the mantissa 1.857142857 + 2.142857142 =3.9999999999 estimate 4.00000000 1 6/7 + 2 1/7 = 4 exact 1.1250000000 + 2.875 = 4.000 +- only 3 significant digits so best estimate possible 1 1/8 + 2 7/8 = 4 exact

The two different pairs of decimals whose sums are 14.1 and one pair involves regrouping on math are 8.4 and 5.7.

you have to add

to find a low estimate for the product of two decimals, round both factors

68

The basic idea is the same as when you estimate sums and differences of larger numbers (which may or may not be integers). You round the numbers to one or two decimal digits, then add them up.

by estimating the number after the decimal

Decimals are estimated by rounding off the decimal places to the nearest tenths,hundredths,thousandths,ten thousandths,etc.

1.0 and 0.5

One way is to do front end estimation!