1. Little Big Maths
Subtraction
Step 17 I can take a 1d number from
a number up to 20 (with
crossing 10)
Step 16 I can take a 1d number from
a number up to 20 (without
crossing 10)
Step 15 I can take 2 or 3 from a
number up to 20
Step 14 I can take 1 number from a
number up to 20