Multiplication
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This document introduces multiplication as both repeated addition and an array. It uses counters arranged in rows and columns to demonstrate that the number of rows multiplied by the number of columns equals the total number of counters. Several examples show writing multiplication sentences to represent the rows and columns as well as equivalent addition sentences by adding the number of counters in each column. The document concludes by using word problems to further illustrate multiplication as repeated addition to calculate how many items are bought for a given number of friends.
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Multiplication is used to find the total number of items when they are organized into equal groups. It involves determining the number of groups and the number of items in each group. Some examples provided are calculating the total number of stars when arranged in groups of two, finding the number of sodas needed when purchased in packs of six, and counting flowers, balloons, and tires organized into arrays. Multiplication allows for efficiently calculating totals when items are grouped equally.
Multiplication arrays ppt
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Chapter-1
Introduction to objective, scope and outcome the subject
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- 1. LearningObjective To understand multiplication as repeatedadditionand as an array
- 3. Hereare 6counters Howmany rows arethere? Howmany columns are there? 3 2
- 4. 3 rows and 2 columns. 3 x 2 = 6 Could wewrite a multiplication sentence? Could wewrite an addition sentence? 2 + 2 +2 =6
- 5. Hereare 6counters Howmany rows are there? Howmany columns are there? 2 3
- 6. 2 rows and 3 columns. 2 x 3 = 6 Could wewrite a multiplication sentence? Could wewrite an addition sentence? 3 + 3 =6
- 7. What do you notice? 2 x 3 = 6 2 + 2 +2 =6 3 x 2 =6 3 + 3 =6
- 8. Hereare 10 counters Howmany rows arethere? Howmany columns are there? 5 2
- 9. 5 rows and 2 columns Could wewrite a multiplication sentence? Could wewrite an addition sentence? 5 x 2 = 10 2 + 2 + 2 + 2 + 2 = 10
- 10. Hereare 10 counters Howmany rows are there? Howmany columns are there? 2 5
- 11. 2 rows and 5 columns. 2 x 5 = 10 Could wewrite a multiplication sentence? Could wewrite an addition sentence? 5 + 5 =10
- 12. What do you notice? 2 x 5 = 10 2 + 2 + 2 + 2 + 2 = 10 5 x 2 = 10 5 + 5 = 10
- 13. Hereare 12 counters Howmany rows are there? Howmany columns are there? 6 2
- 14. 6 rows and 2 columns Could wewrite a multiplication sentence? Could wewrite an addition sentence? 6 x2 =12 2 +2 + 2+ 2 +2 + 2 =12
- 15. Hereare 12 counters Howmany rows are there? Howmany columns are there? 2 6
- 16. 2 rows and 6 columns. 2 x 6 = 12 Could wewrite a multiplication sentence? Could wewrite an addition sentence? 6 + 6 =12
- 17. What do you notice? 2 x 6 = 12 2 +2 + 2+ 2 +2 + 2 =12 6 x2 =12 6 + 6 = 12
- 18. Mrs Mastersonbakes cakes. She bakes her four childrentwo cakes each. How many cakesdoes she bake?
- 19. 4 x 2 = 8 2 + 2 + 2 + 2 = 8 2 x 4 = 8 4 + 4 = 8
- 20. Mrs Patel buys some sweets. She buys her five friends two sweets each. How many sweets does she buy?
- 21. 5 x 2 = 10 2 x 5 = 10 2 + 2 + 2 + 2 + 2 = 10 5 + 5 = 10
- 22. Miss Smets buys some pencils. She buys her seven friends two pencilseach. How many pencils does she buy?
- 23. 7 x 2 = 14 2 x 7 = 14 2 + 2 + 2 + 2 + 2 + 2 + 2 = 14 7 + 7 = 14
- 24. LearningObjective To understand multiplication as repeatedadditionand as an array