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
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.
18.9/7
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.