MathsYear 2Autumn Block 2 (Addition and Subtraction)09 Add 2-Digit and 1-Digit Numbers › Add 2-Digit and 1-Digit Numbers Year 2 Addition and Subtraction Learning Video Clip

Add 2-Digit and 1-Digit Numbers Year 2 Addition and Subtraction Learning Video Clip

Add 2-Digit and 1-Digit Numbers Year 2 Addition and Subtraction Learning Video Clip

Step 9: Add 2-Digit and 1-Digit Numbers Year 2 Addition and Subtraction Learning Video Clip

Cleo travels to Victorian London. She visits an army recruitment office where she helps with some addition problems.

More resources for Autumn Block 2 Step 9.

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Discussion points for teachers

1. Help Cleo and the officer by counting on to find the number of recruits on each day.
Discuss how many men have signed up that day. Discuss how this could be calculated by counting on. Discuss how this could be written as a number sentence.
Monday – 43; Tuesday – 72; Wednesday – 88; Thursday – 93

2. Help Cleo and the officer work out the house number for each letter.
Discuss the column method. Discuss the need for accurate exchanging and recording the exchange accurately.
55 King Street; 34 The Strand; 72 Covent Garden; 83 Cheapside

3. Help Cleo and the officer crack the code.
Discuss partitioning the single digit number to make the next closest multiple of ten. Discuss then adding on the remaining portion of the single digit number.
47 + 3 = 50   50 + 5 = 55;  75 + 5 = 80     80 + 4 = 84;  84 + 6 = 90   90 + 3 = 93

4. Help Cleo work out what the possible combination could have been in.
Discuss the different order in which the numbers could be arranged. Discuss which would be the most accurate method between counting on and column method. This question is open-ended for the children to explore.
Various answers, for example:  58 + 7 = 65

Optional discussion points:
What else could you drawn to help you solve addition calculations?

National Curriculum Objectives

Mathematics Year 2: (2C1) Recall and use addition and subtraction facts to 20 fluently, and derive and use related facts up to 100

Mathematics Year 2: (2C2a) Add and subtract numbers mentally, including: a two-digit number and ones

Mathematics Year 2: (2C2b) Add and subtract numbers using concrete objects and pictorial representations, including: a two-digit number and ones

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