B1
-8
-3
10
12
OA1
3+5 2+3 3+6
2+6
1 + 5
Addition
5+5
4+6
2+4
When you add, you join
groups together.
Example 3 + 4 = 7
OA6
Adding & Subtracting
S
8
a
tr
b
u
ct
The two #’s
being added
together!
16 - 7
-5
The answer is the same
no matter the order!
COMMUTATIVE PROPERTY of addition
changes the order of the
addends without changing the sum.
Example:
3+5=8
5+3=8
Make TEN to ADD and SUBTRACT
Use the strategy
making ten
to help you ADD!
9 + 7 = 16
Add in any order!
What’s an
addend?
n
io
When you subtract, you find out
how many are left or
which group has more.
Example 15 – 8 = 7
OA3
Example:
9 + 7 = 16
10 + 6 = 16
Use the strategy
making ten
to help you
SUBTRACT!
Example:
13 - 3 = 10
10 – 2 = 8
13 - 5 = 8
Created by Lori Kall