We selected some activities to compose and decompose numbers so that students can understand better. Numbers can be compounded or decomposed, they can be presented in different ways. For example: 4,854 is a number in composite form, but it can be presented in decomposed form. To do this, just present it as follows 4,000+800+50+4. The two shapes represent the same value, but they are presented in different ways.

Ask students to answer the following questions:

1 – How many days are there in the month of January, April, August and December?

What is the tens digit and how many days does it indicate?

What is the unit digit and how many days does it indicate?

2 – Compose the numbers below:

3 dozens plus 4 units -

2 dozen plus 6 units -

5 dozens plus 7 units -

8 dozen plus 2 units -

9 dozens plus 5 units -

2 tens plus 1 unit -

4 dozens plus 4 units -

8 dozen plus 9 units -

4 dozens plus 5 units -

1 ten plus 1 unit -

5 dozens plus 9 units -

3 – A football game has two periods of 45 minutes each. See how decomposition makes reading a number easier.

45 = 40 + 5 - forty-five is read

Write the number as it reads:

ninety-nine -

seventy-four -

eighty nine -

fifty-four -

twenty four -

twenty-six -

thirty-nine -

one hundred and fifty -

two thousand and fifty -

three thousand and ninety-four -

4 – Read carefully, think and solve the problems.

In each box there are 20 chocolates. Claudia bought four boxes and 7 more individual chocolates. How many chocolates did Claudia buy?

Rafael will pay a bill of R$54.00 and he only has R$10.00 bills and R$0.50 cent coins. What are the possible ways for Rafael to pay this bill?

Marcos has 5 dozen stickers and Arthur has 9 more stickers than Marcos. How many stickers do each of them have?

Frames -

Arthur -

What is the total number of cards between the two together?

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