working with numbers to 100 les 1

Working with numbers
1 / 15
Slide 1: Slide
RekenenLager onderwijs

This lesson contains 15 slides, with interactive quizzes, text slides and 1 video.

Items in this lesson

Working with numbers

Slide 1 -Slide

Working with numbers
Can you count to 100 really fast?
You might think “sure”
One, two, skip a few, a hundred!
A good way to learn how to count to 100 is by counting by fives or tens to 100.
Try it now.

Slide 2 -Slide

5, 10, 15, 20, 25,
30, 35, 40, 45, 50,
55, 60, 65, 70, 75,
80, 85, 90, 95, 100
10, 20, 30, 40, 50, 60, 70, 80, 90, 100

Slide 3 -Slide

When you count by fives or tens, you are skip counting
You should also learn to skip-count by twos and by threes.
You can practice skip counting by reading only the numbers in color in the next slide. Keep practicing until you can do it without looking at the numbers

Slide 4 -Slide

skip counting practice
1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20
1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20

Slide 5 -Slide

What is skip-counting
A
Just counting
B
Skip the same amount of numbers
C
Skip nothing
D
Skip random numbers

Slide 6 -Quiz

Some special math words

Slide 7 -Slide

The answer you get is called the sum.

Explanation
5        }
------
8 sum

Slide 9 -Slide

You can have more than two addends. What are the addends here?
2 +3 +5 =10
A
2 and 3
B
3 and 5
C
10
D
2and 3 and 5

Slide 10 -Quiz

Can you tell me in your own words what a sum is?

Slide 11 -Open question

Difference
When you subtract, the number left over is called the difference
In 9 - 7 = 2, the difference is 2.

Slide 12 -Slide

What is the difference here?
7
-4
-----------
=
A
2
B
3
C
5
D
11

Slide 14 -Video

Ik hoop dat de uitleg duidelijk was.
Als het niet zo is, wil ik graag weten wat je nog niet begrijpt