SME
Grade 2 Math · Problem type
Addition and subtraction facts to 20
Use this for “Find the value of each expression: 8 + 7, 12 − 5.”
Picture
9 + 6 = 15
● First number ○ Second number
This is an example. Type the numbers from your problem to start.
First number
example
Second number
example
In all
answer
Number sentences
9 + 6 = 15
15 − 6 = 9
Good to know
•
Know these facts by heart by the end of Grade 2.
•
Stuck? Make a ten: 9 + 6 is 9 + 1 + 5.
Step-by-step
WE KNOW
First number: 9
Second number: 6
FIND
in all
Step 1 · Find in all
9 + 6 = ?
Say the fact. If you need to, make a ten first.
9 + 1 = 10
10 + 5 = 15
In all: 15
Check
Put the numbers back in. Both sides should match.
9 + 6 = 15 ✓
15 − 6 = 9 ✓
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Fluently add and subtract within 100
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Solve addition and subtraction word problems
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Fluently add and subtract within 100
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