SME
Grade 2 Math · Operations & Algebraic Thinking
Even and odd numbers
Use this for “Is 7 even or odd? Put the objects in pairs to find out.”
Picture
7 is odd: 3 pairs and 1 left over
Pairs: 3
Left over: 1
This is an example. Type the numbers from your problem to start.
Objects
=
Pairs
+
Pairs
+
Left over
Number sentences
7 = 3 + 3 + 1
7 makes 3 pairs
7 has 1 left over
Good to know
•
Put the objects into pairs (groups of 2).
•
Even: none left over. Odd: one left over.
•
An even number is a double: 8 = 4 + 4.
Step-by-step
WE KNOW
Objects: 7
FIND
pairs, left over
Step 1 · Find pairs
7 makes ? pairs
Match objects two at a time and count the pairs.
Pair up 7: 2, 4, 6 → 3 pairs, 1 left over
1 left over → 7 is odd
Pairs: 3
Step 2 · Find left over
7 has ? left over
Make pairs. Is one left without a partner?
Left over: 1
Check
Put the numbers back in. Both sides should match.
7 = 3 + 3 + 1 ✓
7 makes 3 pairs ✓
7 has 1 left over ✓
Topic check
See what you know: 5 questions on this topic
New questions each time. Pass to mark it complete.
Refresh
Nothing to review first. This is a starting point.