Add Two 3-Digit Numbers 2 Year 3 Addition and Subtraction Learning Video Clip

Step 14: Add Two 3-Digit Numbers 2 Year 3 Addition and Subtraction Learning Video Clip

The children are spending their arcade tickets in the gift shop. Will they have enough tickets for the toys they want to buy?

More resources for Autumn Block 2 Step 14.

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Discussion points for teachers

1. Can he buy both the pencils and the bricks?
Discuss which information we need to begin to solve the problem. What calculation do we need to do first? Why? How will we record each calculation? Recap and discuss exchanging. When does it happen and why?
368 + 259 = 627 for the pencils and the bricks; 627 + 176 = 803. He has enough to buy both the pencils and the bricks.

2. Check the calculation to see if Tilly is correct. What calculation does Tilly need to do? How could we represent this calculation? Why might two different representations help Tilly?
Discuss how we can show exchanging when drawing representations.
Tilly is incorrect; 347 + 487 = 834

3. Which two toys could Billie buy?
Discuss what might help us to decide approximately which Billie could buy? Which toys can she not buy? How do you know? This question is open-ended for the children to explore.
Various answers, for example: Meerkat + wiggly snake (347 + 176 = 523)

4. Which pair of friends can buy a robot?
Discuss which calculation is needed. Discuss setting work out with one digit in each box and lining the digits up correctly. Estimate and decide which pair of friends we think can buy the robot and discuss why.
384 + 396 = 780; Pam and Ying can buy a robot

5. Does he have enough tickets for the toys he wanted?
Discuss which calculation we need to do first and why. What is his new ticket total?
584 + 250 = 834 tickets. 654 + 176 = 830 so he can buy both toys and have 4 tickets left.

Optional discussion points:
What other toys might be in the shop and how many tickets would they cost? In our new shop, what two toys could we buy for 500 tickets?

National Curriculum Objectives

Mathematics Year 3: (3C2) Add and subtract numbers with up to three digits, using formal written methods of columnar addition and subtraction

Mathematics Year 3: (3C4) Solve problems, including missing number problems, using number facts, place value, and more complex addition and subtraction

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