# Mixed Age Year 3 and 4 Addition and Subtraction Step 10 Resource Pack

## Step 10: Mixed Age Year 3 and 4 Addition and Subtraction Step 10

Mixed Age Year 3 and 4 Addition and Subtraction Step 10 Resource Pack includes a teaching PowerPoint and differentiated varied fluency and reasoning and problem solving resources for this step which covers Year 3 Check Answers & Year 4 Checking Strategies. This pack follows the White Rose Mixed Age Maths Guidance for Autumn Block 2.

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**What's included in the Pack?**

This Mixed Age Year 3 and 4 Addition and Subtraction Step 10 pack includes:

- Mixed Age Year 3 and 4 Addition and Subtraction Step 10 Teaching PowerPoint with examples for both year groups.
- Year 3 Check Answers Varied Fluency with answers.
- Year 3 Check Answers Reasoning and Problem Solving with answers.
- Year 4 Checking Strategies Varied Fluency with answers.
- Year 4 Checking Strategies Reasoning and Problem Solving with answers.

**National Curriculum Objectives**

Mathematics Year 3: (3C3) Estimate the answer to a calculation and use inverse operations to check answers

Mathematics Year 4: (4C2) Add and subtract numbers with up to 4 digits using the formal written methods of columnar addition and subtraction where appropriate

Mathematics Year 4: (4C3) Estimate and use inverse operations to check answers to a calculation

Mathematics Year 4: (4C4) Solve addition and subtraction two-step problems in contexts, deciding which operations and methods to use and why

**Differentiation for Year 3 Check Answers:**

**Varied Fluency**

**Developing **Questions to support checking answers to addition and subtraction calculations using the inverse operation. Includes 2-digit numbers.

**Expected **Questions to support checking answers to addition and subtraction calculations using the inverse operation. Includes 2-digit and 3-digit numbers.

**Greater Depth **Questions to support checking answers to addition and subtraction calculations using the inverse operation. Includes 3-digit and 4-digit numbers.

**Reasoning and Problem Solving**

**Questions 1, 4 and 7 (Reasoning)**

**Developing **Identify and explain the odd one out of 4 versions of a calculation. Includes 2-digit numbers.

**Expected **Identify and explain the odd one out of 4 versions of a calculation. Includes 2-digit and 3-digit numbers.

**Greater Depth **Identify and explain the odd one out of 4 versions of a calculation. Includes 3-digit and 4-digit numbers.

**Questions 2, 5 and 8 (Reasoning)
**

**Developing**Explain and correct the mistake made when checking an answer to a calculation. Includes 2-digit numbers.

**Expected**Explain and correct the mistake made when checking an answer to a calculation. Includes 2-digit and 3-digit numbers.

**Greater Depth**Explain and correct the mistake made when checking an answer to a calculation. Includes 3-digit and 4-digit numbers.

**Questions 3, 6 and 9 (Problem Solving)**

**Developing **Calculate the starting number of a calculation by using the inverse operation. Includes 2-digit numbers.

**Expected **Calculate the starting number of a calculation by using the inverse operation. Includes 2-digit and 3-digit numbers.

**Greater Depth **Calculate the starting number of a calculation by using the inverse operation. Includes 3-digit and 4-digit numbers.

**Differentiation for Year 4 Checking Strategies:**

**Varied Fluency**

**Developing **Questions to support using inverse operations to check addition and subtraction of two 3-digit numbers (no exchanges).

**Expected **Questions to support using inverse operations to check addition and subtraction of up to two 4-digit numbers (with exchanges).

**Greater Depth **Questions to support using inverse operations to check addition and subtraction of up to 4-digit numbers from 5-digit numbers (with exchanges).

**Reasoning and Problem Solving**

**Questions 1, 4 and 7 (Reasoning)**

**Developing **Check the accuracy of a bar model with related addition and subtraction of 3-digit numbers. Explain any errors found.

**Expected **Check the accuracy of a bar model with related addition and subtraction of 4-digit numbers. Explain any errors found.

**Greater Depth **Check the accuracy of a bar model with related addition and subtraction of up to 5-digit numbers. Explain any errors found.

**Questions 2, 5 and 8 (Reasoning)
**

**Developing**Find 3 related numbers by addition and subtraction from a choice of 4. Includes 3-digit numbers.

**Expected**Find 3 related numbers by addition and subtraction from a choice of 4. Includes 4-digit numbers.

**Greater Depth**Find 3 related numbers by addition and subtraction from a choice of 4. Includes up to 5-digit numbers.

**Questions 3, 6 and 9 (Problem Solving)**

**Developing **Use 3 digit cards to create an addition or subtraction to achieve a given sum.

**Expected **Use 4 digit cards to create an addition or subtraction to achieve a given sum.

**Greater Depth **Use 5 digit cards to create an addition or subtraction to achieve a given sum.

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