SME
Grade 1 Math · Operations & Algebraic Thinking
Understand the equal sign
Use this for “What number makes this true? 8 + 2 = 5 + ___”
Picture
Left: 8 + 2 = 10.
Right: 5 + 5 = 10.
Level: both sides are the same.
The number sentence is true.
This is an example. Type the numbers from your problem to start.
First on left
+
Second on left
=
First on right
+
Second on right
Number sentences
8 + 2 = 5 + 5
Good to know
•
The equal sign means both sides are the same amount. It does not mean “the answer comes next”.
•
To find a missing number, make both sides the same: 8 + 2 = 5 + ?
Step-by-step
WE KNOW
First on left: 8
Second on left: 2
First on right: 5
FIND
second on right
Step 1 · Find second on right
8 + 2 = 5 + ?
Add the left side. Then count on from the right’s first number to that total.
Left side: 8 + 2 = 10
5 + ? = 10: count on 6, 7, 8, 9, 10 → 5
Second on right: 5
Check
Put the numbers back in. Both sides should match.
8 + 2 = 5 + 5 ✓
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