Math follow up

Follow Up   Maths

WALT: I am learning to add three or more numbers by first making up pairs that add up to 10.

1. 6 + 2 + 4 = 12            6+4=10+2=12
2. 8 + 5 + 2 =15             8+2=10+5=15
3. 8 + 1 + 9 + 2 =20      9+1=10+8+2=20
4. 1 + 5 + 5 + 9 =20      5+5=10+9+1=20
5. 4 + 6 + 4 + 9 + 6 =29        6+4=10+6+4=10+9=29