# RTS

Math

1 / 14
Slide 1: Tekstslide

In deze les zitten 14 slides, met interactieve quizzen, tekstslides en 2 videos.

Lesduur is: 60 min

## Onderdelen in deze les

Math

#### Slide 1 -Tekstslide

What symbol is this?

#### Slide 4 -Video

What symbol is this?

SUBTRACTION

#### Slide 7 -Video

Addition means to add two or more numbers together to make one number that is greater in value. This number is called the sum.
When we want to add numbers together, we use the plus sign:

+

#### Slide 8 -Tekstslide

Imagine you picked every apple from this apple tree. Count how many apples are on the tree!

#### Slide 9 -Tekstslide

Correct! You picked 7 apples from the apple tree!

Now imagine that your friend gave you 4 more apples from their apple tree!

#### Slide 10 -Tekstslide

How many apples do you have now?
A
4
B
40
C
11
D
19

#### Slide 11 -Quizvraag

What Does Subtraction Mean?
Subtraction means to subtract or take one number away from another number to get a number with less value. This number is called the difference.
When we want to subtract one number from another, we use the minus sign   :

-

#### Slide 12 -Tekstslide

Imagine you have these pencils. Count how many pencils you have!

#### Slide 13 -Tekstslide

So if you had 10 pencils, but then gave 3 to a friend, how many pencils do you have now? Count how many pencils you have now!

X
A
7
B
6
C
5
D
4