Year 1 Maths Australia - Free Printable

Let’s solve each addition problem step by step. We’re adding numbers that total 10 or less, so we can count on our fingers or use simple mental math.

1) 6 + 1 = 7
2) 3 + 1 = 4
3) 5 + 2 = 7
4) 8 + 2 = 10
5) 4 + 1 = 5
6) 7 + 2 = 9
7) 9 + 1 = 10
8) 5 + 3 = 8
9) 3 + 2 = 5
10) 3 + 3 = 6
11) 2 + 3 = 5
12) 6 + 2 = 8
13) 4 + 4 = 8
14) 6 + 3 = 9
15) 3 + 6 = 9
16) 7 + 3 = 10
17) 5 + 5 = 10
18) 2 + 6 = 8

Now, the question at the bottom:
“What do you notice about the answer to 6 + 3 and 3 + 6?”

Look at #14: 6 + 3 = 9
Look at #15: 3 + 6 = 9

They are the same! That’s because when you add two numbers, it doesn’t matter which order you put them in — the answer stays the same. This is called the “commutative property” of addition, but for now, just remember: switching the numbers doesn’t change the sum.

Final Answer:
6 + 3 = 9 and 3 + 6 = 9 — they are equal!