How do you estimate using compatible numbers?
- Compatible numbers are pairs of numbers that are easy to add, subtract, multiply, or divide mentally. When using estimation to approximate a calculation, replace actual numbers with compatible numbers.
- Example 1 (Addition) 500 + 300 = 800.
- Example 2 (Subtraction) 19.4 − 3.8 = 15.6.
- Example 3 (Multiplication)
Similarly one may ask, what is the difference between rounding and compatible numbers?
We use compatible numbers to make the problem easier to solve in our head by rounding each number to the nearest ten, twenty, fifty or hundred. But if we make the numbers compatible and round up to the nearest hundred or ten spot, 300 and 350 are much easier to compute in our heads.
Secondly, what are some examples of compatible numbers? Some examples of compatible numbers when doing addition are 225 and 75, 298 and 2, and 540 and 60. Some examples of compatible numbers when doing subtraction are 435 and 25, 800 and 600, and 5986 and 2986.
Similarly, you may ask, what does it mean to estimate the quotient?
Estimating quotients isn't that hard so long as you use compatible numbers! A quotient is the answer you get after dividing one number by another, and compatible numbers are numbers that are close to the numbers in question yet can divide one another easily.
Which number is compatible with 240?
a highly composite number since it has 20 divisors total (1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, and 240), more than any previous number. a refactorable number or tau number, since it has 20 divisors and 20 divides 240.