It means that you round each number to one, one half, or zero
Estimate 43/81 by using compatible numbers
The best way to estimate a quotient using compatible numbers is to first understand how compatible numbers work. They are numbers that are close in value to the actual numbers and are easily added, subtracted or divided.
i think it is 28x26
94
23.3043
70.013
119.3333
300 + 60
77
280 + 500 = 780
That equals 559. If you have to, estimate 210 + 350 = 560
2.6952