Question

20. Select all of the equations that use

compatible numbers to find an estimate
for 28 x 24.
00
30 x 25 = 750
28 x 10 = 280
28 x 25 = 700
25 × 20 = 500
30 × 300 = 9,000

Answer 1

To estimate the product of 28 x 24 using compatible numbers, we can use the equations 30 x 25 = 750, 28 x 10 = 280, and 25 x 20 = 500.

Step-by-step explanation:

Compatible numbers are numbers that are easy to work with mentally and can be used to estimate the value of a calculation. To estimate the product of 28 x 24, we can use compatible numbers by taking the closest multiples of 10 or 100.

1. 30 x 25 = 750: This equation uses compatible numbers because both 30 and 25 are multiples of 10 which are easy to work with.
2. 28 x 10 = 280: This equation uses compatible numbers because 10 is a multiple of 10 which makes the calculation simpler.
3. 25 x 20 = 500: This equation uses compatible numbers because both 25 and 20 are multiples of 5 which are easy to work with.

Therefore, the equations that use compatible numbers to find an estimate for 28 x 24 are 30 x 25 = 750, 28 x 10 = 280, and 25 x 20 = 500.

Learn more about Estimating multiplication using compatible numbers