Bilingual Education Proposal - Mathematics. Centro Docente Rafael Tello.

Lesson 3.

Properties of subtraction

Objective : To know and learn about the properties of subtraction.

To recognize and apply the properties of subtraction.

Keywords: Number, subtraction, minuend, subtrahend, difference, operations.

Vocabulary

Nº	English	Spanish

1	Addition	Adición
2	Change	Cambiar
3	Check	Comprobar
4	Difference	Diferencia
5	Differentiate	Diferenciar
6	Distinguish	Distinguir
7	Exchange	Intercambiar
8	Less	Restar
9	Minuend	Minuendo
10	Neutral element	Elemento neutro
11	Properties	Propiedades
12	Quantity	Cantidad
13	Subtract	Sustraer
14	Subtraction	Sustracción
15	Subtrahend	Sustraendo
16	Term	Término
17	Value	Valor

Lesson Plan Nº3 - English version

Lesson Plan Nº3 - Spanish version

Let's learn!

Subtraction is a mathematical operation that consists of eliminating part of a given quantity to obtain a result. If you wonder what subtraction is, you should know that it is just the opposite of addition.

Before we talk about the properties of subtraction, let's talk about the characteristics of subtraction. Let’s see!

ü Subtraction is NOT commutative:

This means that we CANNOT change the position of the minuend with the subtrahend, because we would have a different answer.

ü Subtraction is NOT associative:

By NOT being able to exchange the value of the minuend with the subtrahend, we cannot associate the values in a subtraction.

Now, let´s distinguish the terms of subtraction.

· *The minuend is the number with the greatest quantity.

· *The subtrahend is the digit or number that we subtract.

· *The difference is the result of subtraction.

Now, let's talk about the properties of subtraction.

First property

To know if this operation is well done with this property, you must take the terms of the subtraction and perform the addition.

Subtrahend plus difference is equal minuend.

Let's check!

Second property

This property tells that the minuend less difference is equal to subtrahend.

Now, look at the subtraction and its terms. Then, take the terms of the minuend and the difference and do the subtraction.

As you can see, the result is the subtrahend.

Third property

This property tells that the subtraction of any number and zero (0) is equal the same number.

Let’s check!

Let’s watch the following video!

Now that you already know all about the properties of subtraction, you are going to practice.

Let's practice!

Activity nº1

Choose the correct option.

Activity nº2

Choose the correct option.

Activities nº3, n°4, n°5 and n°6

Subtraction properties, una ficha interactiva de nataliamc
liveworksheets.com

Lesson 12.

Prime and

composite numbers

Objective: To learn the importance of prime and composite numbers.

Keywords: Prime numbers, natural numbers, composite numbers.

Vocabulary

Nº	English	Spanish

1	Activity	Actividad
3	By using	Utilizando
5	But also	Sino también
6	Both	Ambas
7	Composite	Compuesto
8	Can be	Puede ser
9	Circle	Circula
10	Classify	Clasificar
11	Colored pencil	Color
12	Checking	Comprobando
13	Divisor	Divisor
14	Easier way	La manera más fácil
15	Except	Excepto
16	Find	Encontrar
17	Facilitate	Facilitar
18	Itself	Sí mismo
19	Identify	Identificar
20	Learn	Aprender
21	Not only	No solo
22	Prime	primo
23	Paper	Papel
24	Point out	Resalta
25	Remember	Recordar
26	Section	Sección
27	Table	Tabla
28	Taking into account	Teniendo en cuenta
29	Try	Tratar
30	Workshop	Taller
31	Way	Manera