use compatable numbers to estimate the answers to the following 2 problems. show work
21.98 / 2.56
28.56 / 6.95
21/3 = ?
What compatible number do you think would work for the other problem?
so 21/3 = 7
28 / 7 = 4
Right.
To estimate the answers to the given problems using compatible numbers, we will round the numbers to more manageable values that are easy to divide mentally.
Problem 1: 21.98 divided by 2.56
Step 1: Identify compatible numbers:
Looking at the given numbers, we can round 21.98 to 22 and 2.56 to 3.
Step 2: Perform the estimation:
Divide 22 by 3 mentally. In this case, we get 7 with no remainder.
Therefore, the estimated answer to 21.98 divided by 2.56 is 7.
Problem 2: 28.56 divided by 6.95
Step 1: Identify compatible numbers:
For this problem, we can round 28.56 to 30 and 6.95 to 7.
Step 2: Perform the estimation:
Divide 30 by 7 mentally. In this case, we get 4 with a small remainder.
Therefore, the estimated answer to 28.56 divided by 6.95 is 4 with a small remainder.