Slide 1
Number Bonds to 10 and 20
Year 1 Mathematics Learning about parts and wholes
Slide 2
What are Number Bonds?
Two parts that make a whole Different ways to make the same number Like breaking a biscuit into pieces
Slide 3
Making 10 with Objects
Use counters to find pairs Try different combinations Fill the ten frame
Slide 4
All the Ways to Make 10
{"left":"0 + 10\n1 + 9\n2 + 8\n3 + 7\n4 + 6\n5 + 5","right":"6 + 4\n7 + 3\n8 + 2\n9 + 1\n10 + 0"}
Slide 5
Quick Check!
If I have 7 sweets and need 10 altogether... How many more sweets do I need?
Slide 6
Moving to Number Bonds to 20
20 is like two tens together We can use what we know about 10 Bigger numbers, same idea
Slide 7
Finding Pairs for 20
Start with 10 + 10 Try 15 + 5 What about 12 + 8? Use two ten frames
Slide 8
Well Done!
You can make 10 in many ways You can make 20 in many ways Number bonds help us with adding and taking away Keep practicing!