math grade 1

1. OBJECTIVES
Regroups sets of
ones into sets of
tens and sets of
tens into
hundreds using
objects.

3. Alexander’s New Toy
It is Saturday and
Alexander is so excited
because his friends will
come. It is his 7th birthday.

4. Alexander’s New Toy
After the party, he opened
some of his gifts excitedly.

5. Alexander’s New Toy
He received 10 blocks, 12
toy cars, 21 marbles, and
36 toy animals.

6. Alexander’s New Toy
What a wonderful birthday
it is.

7. 1. What did Alexander
received on his birthday?
Birthday gifts from his
friends.

8. 2. How many blocks, toy cars,
and animals, and marbles
does he have?
10 blocks
12 toy cars
21 marbles
36 toy animals

9. Let’s Check This Out!
If we will group the blocks by 10, we will
have 1 set of blocks

10. 10 small blocks 1 set of blocks

11. There are 21 marbles
How many marbles do we have?

12. If we will group the marbles by
10.
We will have 2 sets and 1 piece of marble.

13. Or shall we say
21 = 2 tens and 1 ones

14. REGROUPING
-is a process of making
groups of tens.
-to regroup means to
rearrange.

15. Example
Clara buy 22 apples as a
food offering. How many
groups of 10 are there?

16. Example
Clara buy 22 apples
as a food offering.
How many groups
of 10 are there?
22 = 2 tens and 2 ones

17. Example
Mang Jose harvested 100
mangoes in his backyard.
If we will group the
mangoes into 10, how
many groups do we have
in all

18. 1
2
3
4
5
6
7
8
9
10
100 mangoes = 10
groups of mangoes