﻿ Add two 4-Digit Numbers 3 Year 4 Addition and Subtraction Learning Video Clip | Classroom Secrets
MathsYear 4Autumn Block 2 (Addition and Subtraction)04 Add Two 4-Digit Numbers 3 › Add two 4-Digit Numbers 3 Year 4 Addition and Subtraction Learning Video Clip

# Add two 4-Digit Numbers 3 Year 4 Addition and Subtraction Learning Video Clip ## Step 4: Add two 4-Digit Numbers 3 Year 4 Addition and Subtraction Learning Video Clip

Sebastian the explorer has been travelling deeper and deeper into the jungle hoping to make new discoveries for his research. He needs to use his knowledge of adding two 4-digit numbers to escape from a deep ravine.

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1. Calculate the total so that he knows how far he needs to climb up. Discuss use of exchanging in different columns.
4,639 + 1,587 = 6,226
2. What must his calculation be? Discuss which numbers create which totals to work out where each digit should go. Discuss effect of exchanging.
2,917 + 6,354 = 9,271
3. Which combination of digit rocks could he use? Discuss which digits will create a value within set parameters. This question is open-ended for the children to explore.
Various answers, for example: 2,747 + 1,633 = 4,380
4. Calculate the total to enable Sebastian to climb to safety. Discuss unconventional partitioning and what each number represents. Discuss how this relates to exchanging.
2,987 + 4,638 = 7,625

National Curriculum Objectives

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

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