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Math
Addition and Subtraction
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Slide 1:
Slide
Mathematics
2nd Grade
This lesson contains
14 slides
, with
interactive quizzes
,
text slides
and
2 videos
.
Lesson duration is:
60 min
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Items in this lesson
Math
Addition and Subtraction
Slide 1 - Slide
What symbol is this?
Slide 2 - Slide
ADDITION
Slide 3 - Slide
Slide 4 - Video
What symbol is this?
Slide 5 - Slide
SUBTRACTION
Slide 6 - Slide
Slide 7 - Video
What Does Addition Mean?
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 - Slide
Imagine you picked every apple from this apple tree. Count how many apples are on the tree!
Slide 9 - Slide
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 - Slide
How many apples do you have now?
A
4
B
40
C
11
D
19
Slide 11 - Quiz
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 - Slide
Imagine you have these pencils. Count how many pencils you have!
Slide 13 - Slide
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
Slide 14 - Quiz
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