This document provides instruction on addition using groups of 10. It explains that when adding numbers between 11-19, we add 1 group of 10 to the single digit number. When adding numbers between 20-29, we add 2 groups of 10. Larger multiples of 10 like 30, 40, etc. are made by adding that number of groups of 10. The document includes examples of writing numbers up to 100 by showing the appropriate groups of 10. It provides homework of writing 70, 90, and 100 using groups of 10.

1. Addition
Objective: Addition grouping in tens.
10’s

2. Addition of groups of 10
Any number over10 we add groups of 10 to
that number.
10
Addition (noun) Grouping Number (noun)
La suma (noun) El numero

3. Addition of 1 group of 10 and the number
When we want to write numbers from 11 to 19,
you add 1 group of 10 to the number.
10
11
13
15

4. Addition of 2 groups of 10
Group 1 Group 2
10 + 10 = 20

5. When adding 20 we add 2 groups of 10
and the number
10 + 10 = 20
23
25

6. Addition of 10 in 3 groups
Group 1 Group 2 Group 3
10 + 10 + 10 = 30

7. Addition of groups of 10 and their
numbers.
30 will add 3 groups of 10 and the number
40 will add 4 groups of 10 and the number
50 will add 5 groups of 10 and the number
60 will add 6 groups of 10 and the number
70 will add 7 groups of 10 and the number
80 will add 8 groups of 10 and the number
90 will add 9 groups of 10 and the number
Writing 100 we add 10 groups of 10.

8. Click on the link
Add on 10
https://www.youtube.com/watch?v=Bs
cyTczYxEU

9. Revision
Instruction do this in your book.
Writing the number 21 do we add
a) 1 group of 10
b) 2 groups of 10

10. Home-work
Instruction write this in your book
Write 70 showing groups of 10
90 showing groups of 10 .
Write 100 showing 10 groups of 10.

11. Reference:Annessa Khan-Ramcharitar
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