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

Step 10: 2- Digit and 3- Digit Numbers Year 3 Addition and Subtraction Learning Video Clip

Ali the animal keeper has forgotten her master key to open all the buildings for the day! Luckily, she can unlock them using the keypad instead. Help her to solve each problem to make sure that the conservation park can open on time.

More resources for Autumn Block 2 Step 10.

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Discussion points for teachers

1. Help Ali use the digit cards to make the calculation correct.
Discuss where each digit card could, or could not, be placed using knowledge of number bonds to help. Discuss whether there are any digit cards that can only be placed in one position. Discuss whether there is only one answer.
Various answers, for example: 56 + 423 or 23 + 456

2. Help Ali to write the number sentence that is represented.
Discuss what each tiger represents. Discuss what is represented by the crossing out. Discuss which operation is being shown.
236 – 32 = 204

3. Help Ali to unlock the door by finding the correct answer.
Discuss how to represent the total number of zebras. Discuss which representations are correct.
Representation 2

4. Help Ali to unlock the final door using the clues.
Discuss where the digit cards can, or cannot, be placed and why. Discuss whether there is only one answer. This question is open-ended for the children to explore.
Various answers, for example: 72 + 516 = 588 or 67 + 512 = 579

Optional discussion points:
Write some more animal puzzles and problems for a friend.

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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