Slide 2:
Pt. 1 Subtract faster than you can sneeze!
Slide 3:
Disclosure Works with numbers with 0 ’ s after the first digit. 10000 1000 100 etc….
Slide 4:
10000 – 3694 1000 – 729 100 – 68 10000 – 5982 10000 – 57 1000 – 843 100 – 32 1000 – 214 10000 - 2473 “ So…whats the uh secret…? ”
Slide 5:
10000 – 5286 = 4714 10000 - 5 2 8 6 4 1 7 4
Slide 6:
What you do is… ‘ Subtract each digit from 9 and the last from 10 ’
Slide 7:
SO 10000 – 5286 = 4714 9 – 5 = 4 9 - 2 = 7 9 – 8 = 1 10 – 6 = 4 4 1 7 4
Slide 8:
10,000 – 3694 1000 – 729 100 – 68 10,000 – 5982 10,000 – 57 1000 – 843 100 – 32 1000 – 214 10,000 - 2473 Remember this..?
Slide 9:
10000 – 3694 = 6306 1000 – 729 = 271 100 – 68 = 32 10000 – 5982 = 4018 10000 – 57 = 9943 1000 – 843 = 157 100 – 32 = 68 1000 – 214 = 786 10000 – 2473 = 7527 Aaaaaahhh…
Slide 10:
‘ Subtract each digit from 9 and the last from 10 ’ Remember!
Slide 11:
Practise makes PERFECT!