This document discusses two types of division: exact division and integer division. Exact division occurs when the remainder is equal to 0, meaning the dividend can be divided evenly among the divisor. Integer division occurs when there is a remainder left over because the dividend cannot be divided evenly among the divisor. The remainder is different from 0 in integer division.

1. División exacta: es cuando el resto es igual a 0. Es
decir, se ha podido repartir todo el dividendo en
partes iguales.
División entera: es cuando al repartir nos sobra algo,
esto es, no se ha podido dividir el dividendo entre el
divisor en partes iguales. Sabemos que una división
es entera cuando el resto es distinto de 0.
1st grade

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3. You can describe the topic
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Introduction Place value
Comparing Patterns
03
02
04
01
Table of contents

4. Observá, calculá y sacá conclusiones:
5 x 8 x 2= 2 x 5 x 8= 8 x 2 x 5 =
¿Qué sucedió con los resultados?
• Pensá 3 formas más de ordenar los números

5. Let's talk about place value
Mercury takes a little more than 58 days
to complete its rotation, so try to
imagine how long days must be there!
Since the temperatures are so extreme,
albeit not as extreme as on Venus,
Mercury has been deemed to be non-
habitable for humans
Mercury is the closest planet to the Sun
and the smallest one in the entire Solar
System. Contrary to popular belief, this
planet's name has nothing to do with
the liquid metal. Mercury was, instead,
named after the famous Roman
messenger god Mercurius

6. Introduction
01
You can enter a subtitle here if you need it

7. Number basics
Do you know what helps you make your point crystal clear? Lists
like this one:
● They’re simple
● You can organize your ideas clearly
● You’ll never forget to buy milk!
And the most important thing: the audience won’t miss the point of
your presentation

8. Introduction to numbers
Venus has a beautiful name and is the
second planet from the Sun. It’s hot and
has a poisonous atmosphere
Mercury is the closest planet to the Sun
and the smallest one in the System —
it’s only a bit larger than the Moon
Writing numbers
Counting object

9. Reading and writing numbers
1. Write these numbers in numerals
● Twenty-five
● Ninety-two
● Fifty
● Forty-six
● Sixty-one
● Thirty-eight
2. Match each number with the number written in words
589 Eight hundred and fifty-nine
583 Five hundred and ninety-eight
859 Five hundred and eighty-nine
905 Nine hundred and five
29

10. Counting strategies
Mercury is the closest
planet to the Sun and the
smallest of them all
Venus has a beautiful name
and is the second planet
from the Sun
Despite being red, Mars is
actually a cold place. It’s full
of iron oxide dust
Using fingers Using objects Using numbers

11. Problem solving
Problem Answer
Susie has 5 apples. She gives 2 apples to her friend.
How many apples does Susie have left?
There are 8 birds on a tree. 3 birds fly away. How
many birds are still on the tree?
Mary has 6 toys. She receives 3 more toys as a gift.
How many toys does Mary have now?
There are 10 children playing in the park. 4 children
go home. How many children are left in the park?
Tim has 7 stickers. He buys 4 more stickers from the
store. How many stickers does Tim have in total?

12. Despite being red, Mars is a cold
place. It’s full of iron oxide dust
Earth is the third planet from the
Sun and has life
Mercury is the closest planet to the
Sun and the smallest of them all
Venus has a beautiful name and is
the second planet from the Sun
Counting by fives
Counting by tens
Others
Skip counting
Counting by twos

13. Venus has extremely
high temperatures
Neptune is the farthest
planet from the Sun
Reviewing concepts
Mars is actually a very
cold place
Mercury is the closest
planet to the Sun
Saturn is a gas giant
with several rings
Jupiter is the biggest
planet of them all
Strategies Counting Writing
Reading Numbers Place value
01 02 03
03 04 05

14. * Propiedad no conmutativa: en el caso de las divisiones, no se da la propiedad
conmutativa. Al contrario de lo que sucede en la propiedad conmutativa de la
multiplicación, si cambiamos el orden de los números de una división, se alterará
el resultado. Por ejemplo: 10 ÷ 2 = 5, pero 2 ÷ 10 = 0, 2 .
* Propiedad no asociativa: si descomponemos uno o todos los números de una
división, o los agrupamos de diferentes maneras, el cociente o el resultado
pueden cambiar. Por ejemplo: 200 ÷ 10 ÷ 5 puede dar 4 o 100 según como se
asocie. Si realizamos (200 ÷ 10) ÷ 5 = 20 ÷ 5 = 4, pero es diferente a 200 ÷ (10 ÷ 5) =
200 ÷ 2 = 100
* Propiedad distributiva: es válida la propiedad distributiva de la
división cuando se descompone el dividendo. Por ejemplo: 400 ÷ 10 = 200 ÷ 10 +
200 ÷ 10
Propiedades de la División:

15. En la multiplicación se cumplen las siguientes propiedades:
•Conmutativa: porque, si cambio el orden de los números que se multiplican, el resultado
es el mismo (2 x 7 = 7 x 2).
•Asociativa: porque, si descompongo los números de una multiplicación y los agrupo en
forma diferente, el resultado es el mismo (6 x 8 = 3 x 2 x 8 = 3 x 2 x 4 x 2).
•Distributiva: porque, si multiplico dos números, puedo descomponer uno de ellos en
sumas o restas y luego multiplicar cada parte de esa descomposición por el otro número.
Luego sumo o resto los resultados según corresponda (3 x 12 = 3 x 10 + 3 x 2 = 30 + 6 = 36).

16. A picture is worth a thousand words

17. A picture
always
reinforces
the concept
Images reveal large amounts of data, so
remember: use an image instead of a
long text. Your audience will appreciate it

18. 98,300,000
Big numbers catch your audience’s attention

19. Jupiter's rotation period
9h 55m 23s
333,000
The Sun’s mass compared to Earth’s
386,000 km
Distance between Earth and the Moon

20. Reading and writing numbers II
Numerals Nº in words Tens Ones
22 twenty-one
16 Sixteen
35
Fifty-three 5 3
6 7
49
Place value: fill in the missing boxes with the correct numbers

21. Mercury is the closest
planet to the Sun and the
smallest of them all
Mercury
Venus has a beautiful
name and is the second
planet from the Sun
Venus
Despite being red, Mars is
actually a cold place. It’s
full of iron oxide dust
Mars
Percentage insights
50% 75%
25%

22. More problems
Choose the correct answer
There are 9 cookies on a plate. Emily eats 2.
How many cookies are left on the plate?
Sam has 12 marbles. She gives 5 marbles to her
sister. How many marbles does Sam have?
There are 15 balloons at the party. 7 balloons
pop. How many balloons are left?
John has 8 crayons. He gives 3 crayons to his
friend. How many crayons does John have left?
a) 7 cookies
b) 9 cookies
a) 17 marbles
b) 7 marbles
a) 11 crayons
b) 3 crayons
a) 15 balloons
b) 8 balloons
c) 11 cookies
d) 2 cookies
c) 5 crayons
d) 8 crayons
c) 5 marbles
d) 12 marbles
c) 7 balloons
d) 22 balloons

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26. Reading and writing numbers
1. Read the following numbers aloud
and write them in numeral form
2. Write the following numbers in
word form:
a) Sixteen
b) Twenty-three
c) Forty-five
a) 12
b) 36
c) 51
3. Complete the number sequence: 4. Write the missing numbers:
a) 10, 11, 12, _ _, 14, _ _, 16
b) 25, _ _, 27, 28, _ _, 30, _ _
c) 40, 41, _ _, 43, _ _, 45, _ _
a) _ _, 17, 18, 19, 20
b) 30, _ _, 32, _ _, 34
c) 50, 51, _ _, 52, _ _

27. Mercury
Math across the map
Mercury is the smallest one
in the entire Solar System.
This planet’s name has
nothing to do with the
liquid metal, since Mercury
was named after the
Roman messenger god

28. Comparing numbers
1. Compare the numbers using the
symbols >, < 0r =
2. Arrange the numbers in ascending
order (from least to greatest)
a) 7__5
b) 10__10
c) 12__17
a) 6, 2, 9, 4, 7
b) 11, 5, 8, 13, 6
c) 15, 12, 17, 10, 14
3. Compare the numbers using the
symbols >, < 0r =
4. Arrange the numbers in descending
order (from greatest to least)
a) 20__15
b) 19__24
c) 13__17
a) 12, 7, 4, 9, 5
b) 20, 15, 18, 10, 13
c) 11, 14, 8, 16, 5

29. Journey through lessons
Introduction
Venus is the second
planet from the Sun
Counting
Mercury is the closest
planet to the Sun
Comparing
Despite being red,
Mars is a cold place
Value
Jupiter is the biggest
planet of them all
Lesson
1 and 2
Lesson
3 and 4
Lesson
5 and 6
Lesson
7 and 8

30. What the lessons are about
Nº Lesson title Topics covered
1 Introduction to numbers Counting objects, reading and writing numbers
2 Place value Understanding tens and ones, base-10 blocks
3 Building numbers with expanded form Representing numbers, expanded form
4 Comparing numbers Using <, >, and = symbols, ordering numbers
5 Number patterns and skip counting Identifying patterns, completing patterns
6 Skip Counting by 2s, 5s, and 10s Skip counting patterns by 2s, 5s, and 10s
7 Addition within 20 Understanding addition, adding 10, adding 20
8 Subtraction within 20 Understanding subtraction
9 Problem solving Word problems with addition and subtraction

31. Number sense and place value
Introduction about the topic
Despite being red, Mars is actually a cold place. It’s full of
iron oxide dust, which gives the planet its reddish cast
Place value
Mercury is the
smallest planet
Adition
Jupiter is the biggest
planet of all them
Subtraction
Venus is the second
planet from the Sun
Problems
Saturn is a gas giant
with rings

32. Number pie adventure
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Mercury
Mercury is the
smallest planet
Jupiter
Jupiter is the
biggest planet
Venus
Venus has a
beautiful name
Saturn
Saturn is a gas
giant with rings
15%
20%
40%
25%

33. More exercises
1. Identify the digit in the specified place
value of each number
2. Write the number that comes before and
after the given numbers:
a) What is the tens digit in the number 36?
b) What is the ones digit in the number 49?
c) What is the tens digit in the number 82?
a) Before: 28, after: __
b) Before: 64, after: __
c) Before 51, after: __
True or false T F
In the number 425, the digit 4 represents 40 ✗
The expanded form of the number 482 is 400 + 80 + 2
When counting by tens, the ones digit remains the same
The place value of the digit 3 in the number 532 is 300

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