## Saturday 13 September 2014

### Montessori Activity: Dynamic Addition with Golden Beads - Thousand Place Value

AGE: 5.5 years old (after your child has tried The Bank Game and Vertical Static Addition)

MATERIALS:

2. 19 ten-bars
3. 19 hundred-squares
4. 9 thousand-cubes
6. 5 felt pieces
7. 1 pencil and eraser

PRESENTATION:

1. Arrange the materials according to the picture above.

2. Say, "Today we are going to learn how to add dynamic quadruple digit numbers together."

3. Invite your child to read the first equation or you can also read it together, for e.g. 2535+1566=?

4. Point to the unit place value of the first addend in the worksheet and ask, "How many units are there?" Your child should answer 5.

5. Take 5 unit beads and place it on the felt piece to the right of the worksheet.

6. Next, point to the ten place value of the first addend and ask, "How many tens are there?" Your child should answer 3 tens.

7. Take 3 ten-bars from the left felt piece and place it on the right felt piece to the left of the selected unit beads.

8.  Next, point to the hundred place value of the first addend and ask, "How many hundreds are there?" Your child should answer 5 hundreds.

9. Take 5 hundred-squares from the left felt piece and place it on the right felt piece to the left of the selected ten-bars.

10.  Next, point to the thousand place value of the first addend and ask, "How many thousands are there?" Your child should answer 2 thousands.

11. Take 2 thousand-cubes from the left felt piece and place it on the right felt piece to the left of the selected hundred-bars.

12. Point to the second addend and repeat the process. Invite him to count out the unit beads, ten-bars hundred-squares and thousands-cubes from the second addend, i.e. 6 unit beads, 6 ten-bars, 5 hundred-squares and 1 thousand-cube and place them on the right felt piece below the first addend's collected beads.

14. Invite your child to count the units and when he reaches the 10th unit, ask your child to exchange for 1 ten-bar, saying "10 units is the same as 1 ten-bar," and place the it with the other hundred-squares.

15. Ask your child to count the remainder units, i.e. 1 unit in this case, and write the number in the unit place on the worksheet.

16. Invite your child to count the ten-bars and when he reaches the 10th ten-bar, ask your child to exchange for 1 hundred-square, saying "10 ten-bars is the same as 1 hundred-square." and place the it with the other hundred-squares.

17. Ask your child to count the remainder ten-bars, i.e. 0 ten-bar in this case, and write the number in the ten place on the worksheet.

18. Invite your child to count the hundred-squares and when he reaches the 10th hundred-square, ask your child to exchange for 1 thousand-cube, saying "10 hundred-squares is the same as 1 thousand-cube," and place the it with the other thousand-cubes.

19. Ask your child to count the remainder hundred-squares, i.e. 1 hundred-square in this case, and write the number in the hundred place on the worksheet.

20. Ask your child to count the thousand-cubes, i.e. 4 thousand-cubes in this case, and write the number on the thousand place on the worksheet.

22. Invite your child to try with the next equation.

VARIATIONS:

1. Other materials can be substituted for the color bead stairs, such as buttons, counters, etc..
2. Try with vertical presentation of the equation.

REFERENCES: