Using Compatible Numbers for Estimation

The video tutorial explains the concept of compatible numbers, which are used to simplify mental math by rounding numbers to the nearest ten, hundred, or thousand. Compatible numbers help in estimating results for addition, subtraction, multiplication, and division. The tutorial provides examples for each operation, demonstrating how rounding can make calculations easier and faster. The video concludes with a call to action for viewers to access additional resources and subscribe for more content.

What is the primary purpose of using compatible numbers?

• To get an exact answer

• To make calculations more complex

• To avoid rounding numbers

• To estimate answers using mental math

Compatible numbers are also known as what?

• Friendly numbers

• Difficult numbers

• Complex numbers

• Exact numbers

When using compatible numbers, to which place value should you round?

• Nearest five

• Nearest ten, hundred, or thousand

• Nearest two

• Nearest one

In the baseball card example, what is the rounded number of cards Jeff had?

• 340

• 320

• 350

• 330

How much did Mrs. Lozano spend at the glitter convention using compatible numbers?

• $400

• $380

• $370

• $390

What is the first step in using compatible numbers for multiplication?

• Subtract the numbers

• Add the numbers

• Round the numbers to the nearest ten

• Divide the numbers

What is the estimated product of 38 and 22 using compatible numbers?

• 800

• 850

• 750

• 700

What is a challenge when using compatible numbers for division?

• Finding compatible numbers

• Knowing multiplication facts well

• Adding zeros to the result

• Rounding to the nearest hundred

How many students will ride on each bus in the field trip example using compatible numbers?

• 55

• 50

• 45

• 40