Subtract by Making Tens

The video tutorial explains the concept of fact families of 10 and demonstrates the making ten strategy to simplify addition and subtraction problems. It uses visual aids like double 10 frames and number lines to illustrate how numbers can be decomposed to make calculations easier. The tutorial provides examples to show how these strategies can be applied to solve subtraction problems effectively.

What is a fact family of 10?

• A set of numbers that multiply to 10

• A sequence of numbers that divide into 10

• A pair of numbers that add up to 10 and their subtraction counterparts

• A group of numbers that add up to 20

In the Making Ten strategy, what is the purpose of using a double 10 frame?

• To model subtraction by making ten

• To visualize numbers for addition

• To divide numbers into equal parts

• To multiply numbers

When decomposing the number 7 in the Making Ten strategy, what two numbers is it broken into?

• 4 and 3

• 6 and 1

• 5 and 2

• 3 and 4

How many counters are left when you solve 15 - 7 using the Making Ten strategy?

• 5

• 6

• 7

• 8

In the example of solving 14 - 8, what is the first step to make 10?

• Add 8 counters

• Remove 8 counters

• Remove 4 counters

• Add 4 counters

What is the other decomposed part of 12 when using the number line to solve 18 - 12?

• 3

• 5

• 6

• 4

What is the result of 18 - 12 using the Making Ten strategy on a number line?

• 6

• 7

• 5

• 4