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In the same way as you estimate them for whole numbers.
I think you round it to the nearest whole number...
1.0 and 0.5
0.235 * 0.6891 = 0.1619385 What's to estimate? The total decimal places in the multiplicands is the total in the answer.
An estimate is related to a number, not an arithmetic operation. Having said that, the estimate MUST take account of the context of the operations (+-*/).
In the same way as you estimate them for whole numbers.
to find a low estimate for the product of two decimals, round both factors
by estimating the number after the decimal
Estimate 4883 by 7 and the division problem solved we get 697.57.
Decimals are estimated by rounding off the decimal places to the nearest tenths,hundredths,thousandths,ten thousandths,etc.
I think you round it to the nearest whole number...
1.0 and 0.5
7.8+31.39+6.95
For multiplication or division, the only reasonable estimate is -2.
we have to find compatible numbers
Either or both.
Because some decimals are really long and hard to write down. Especially if they're not repeating ones. So people round them to be able to say them or write them.