Facts to 10
7 + ? = 10
3
12 + ? = 20
8
8 + 3 = ?
11
12 + 14 = ?
What is the answer when you are adding called?
The sum.
5 + ? = 10
5
9 + ? = 20
11
5 + 7 = ?
12
27 + 11 = ?
38
What is it called when you solve math in your head?
Mental Math
6 + ? = 10
4
16 + ? = 20
4
9 + 4 = ?
13
34 + 31 = ?
65
What is the opposite of addition?
Subtraction
2 + ? = 10
8
5 + ? = 20
15
8 + 8 = ?
16
45 + 15 = ?
60
When you solve word problems you can't just write the answer, you have to...
PROVE IT!
10 + ? = 10
0
2 + ? = 20
18
9 + 7 = ?
16
38 + 25 = ?
63
There is only one correct strategy you can use to solve questions. True or false?
FALSE! There are lots of different strategies! :)