Math activity: Composition and decomposition of natural numbers

Mathematics activity, about composition, decomposition and reading of natural numbers, suitable for students in the third year of elementary school.

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SCHOOL: DATE:

PROF: CLASS:

NAME:

Composition, decomposition and reading of numbers

Solve the following problems:

1.Daniel has two R$10.00 bills and 23 R$1 coins and his friend Marcela has 54 R$1 coins. How much money do Daniel and Marcela have in total?

(a) 87

(b) 97

(c) 37

(d) 27

2.In each box there are 10 bullets. Maria bought 3 boxes and 6 more candies. How many bullets did she buy?

(a) 26

(b) 36

(c) 56

(d) 46

3.Marcelo will pay a bill of R$23.00 reais and he only has 2 bills of R$10.00. How long before Marcelo pays the bill?

(a) 3.00 reais left

(b) 2.00 reais left

(c) 4.00 reais left

(d) 6.00 reais to go

4.Cássio has 4 dozen marbles and Fabrício has 10 more marbles than Cassio.

The. How many balls is each one?

B. What is the total of the balls of the two together?

5.Write how the following numbers are read:

a.36- 

b.51 - 

c.47- 

d.89- 

e.99- 

f.33- 

g.66- 

h.23- 

i.13- 

j.63- 

k.82 - 

1.22- 

6.Record what each digit indicates in the numbers below.

The). 48 = 

b) .65 = 

c).35 = 

d).84 = 

e).91 = 

f).27 = 

7.Complete the table below:

Number	Tens and Units	Decomposition	Reading
24	2 tens and four units
35
44	Forty-four
65
75	70+5
85

By Rosiane Fernandes Silva

At answers are in the link above the header.

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