Tower of Mathematics  Subtraction
1) Subtract numbers from up to 10 (Y1) 
2) Subtract numbers from up to 20 (Y1) 
3) Subtract ones from a twodigit number (Y2) 
4) Subtract tens from a twodigit number (Y2) 
5) Subtract a twodigit number from a twodigit number (Y2) 
6) Subtract from 100 (multiples of 10) (Y3) 
7)Subtract from 100 (multiples of 5) (Y3) 
8) Subtract from 100 (Y3 & Y4) 
9) Subtract from 1000 (multiples of 100) (Y3 & Y4) 
10) Subtract ones from a threedigit number(Y3) 
11) Subtract tens from a threedigit number (Y3) 
12) Subtract hundreds from a threedigit number (Y3) 
13) Subtract a decimal (1dp) from 1 (Y4 & Y5) 
14) Subtract a decimal (1dp) from 10 (Y4 & Y5) 
15) Subtract twodigit numbers from threedigit numbers (y4) 
16) Subtract combinations of decimals (1dp) (Y4) 
17) Subtract a decimal (2dp) from 1 (Y5 & Y6) 
18) Subtract combinations of threedigit numbers (Y5 & Y6) 
19) Subtract combinations of decimals (2dp) (Y5 & Y6) 
