Subtracting Decimals with Base 10 Blocks

This video tutorial teaches how to subtract decimals using base 10 blocks. It begins with a review of representing whole numbers with base 10 blocks and extends this concept to decimals. The tutorial explains how to use smart estimation to simplify subtraction problems and demonstrates the process of subtracting decimals with practical examples. By the end, viewers will understand how to represent and subtract decimals using base 10 blocks effectively.

What does a single block represent when using base 10 blocks for decimals?

• One whole unit

• One tenth

• One hundredth

• One thousandth

When making a smart estimate, what is the main goal?

• To always round to the nearest tenth

• To avoid using base 10 blocks

• To choose numbers that are easy to work with and close to the original numbers

• To round numbers to the nearest whole number

In the example of subtracting 85 hundredths from 25 hundredths, what is the final result?

• 6 tenths and 5 hundredths

• 5 tenths and 5 hundredths

• 5 tenths and 0 hundredths

• 6 tenths and 0 hundredths

What is the first step when subtracting 15 hundredths from 1 and 54 hundredths using base 10 blocks?

• Subtract 4 hundredths

• Subtract 1 whole unit

• Subtract 5 tenths

• Subtract 5 hundredths

Why might you need to break down a tenth into hundredths during subtraction?

• To ensure you have enough hundredths to subtract

• To simplify the addition process

• To make the subtraction process faster

• To avoid using whole units