Subtraction and Counting Strategies

The video tutorial teaches subtraction by counting down to 10. It begins with a scenario involving marbles to introduce the concept. The lesson reviews different ways to make ten and demonstrates how counting down can help with subtraction. It uses examples like 18 minus 3 and 15 minus 7, employing ten frames as a visual aid. The tutorial concludes with a practical example of subtracting marbles and summarizes the key learning points.

Lily had 15 marbles and gave some to her friend. How many did she give away?

• 5

• 8

• 6

• 7

Which of the following pairs add up to 10?

• 3 + 7

• 5 + 6

• 4 + 5

• 2 + 9

What is the result of 18 minus 3 using the counting down method?

• 13

• 14

• 15

• 12

If you start at 18 and count down 8, where do you end up?

• 11

• 10

• 8

• 9

How can you break down 7 to subtract it from 15 using ten frames?

• 3 + 4

• 4 + 3

• 5 + 2

• 6 + 1

What is 15 minus 7 using the ten frames method?

• 6

• 7

• 8

• 9

How many marbles does Lily have left after giving some to her friend?

• 8

• 9

• 10

• 11

What is the first step in solving 15 minus 6 using the counting down method?

• Add 6 to 15

• Subtract 6 directly

• Count up from 6

• Break 6 into 5 and 1

After subtracting 5 from 15, what is the next step to solve 15 minus 6?

• Subtract 1

• Subtract 2

• Add 1

• Add 2