# St Valentine Heart Glyphs Addition/Subtraction Problem Solving PPT Worksheets

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1 MB|14 pages
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Product Description
This is a problem-solving fun activity for St. Valentine’s Day as an introduction to using glyphs in the shape of whole and half-shaped hearts to work out addition and subtraction sums.

Content:

- 12 Slide PowerPoint Presentation
- 4 Subtraction Worksheets

Start the lesson by asking students if they know what hieroglyphs and/or glyphs are and who used them and why they were used instead of the number system we used today.

Slides 3-4
On the presentation the lesson begins by briefly explaining how the Aztecs and the Mayans used glyphs as numbers and then the class have a go at working out the numbers.

Main lesson
Slides 5 – 13
The lesson goes on to explain using whole hearts and half-shaped hearts as glyphs and then using these symbols to work out addition and take away sums.

It includes whole class activity and detailed examples of how the students work out the answers. Remind the students that the number of half-shaped hearts tells you how many whole hearts to take away.

Encourage students to use their fingers to demonstrate how using the glyphs work before handing out the worksheets. For example, if the students see 7 whole hearts, they add them up to make 7 as one whole heart is equal to 1. For subtraction, if the students see 7 whole hearts and 4 half-shaped hearts, they hold up 7 fingers and then fold down 4 fingers to take away the 4 half-shaped hearts.

Consolidation
There are three worksheets for students to add up the hearts and four worksheets on taking away.

Success Criteria
Ask students if they enjoyed the activity and how did they find working out the problems – easy, ok or difficult?

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Total Pages
14 pages
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Teaching Duration
N/A
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