1. INTRO

2. SUBSTITUTION WHAT IS SUBSTITUTION?

3. SAME THING HAPPENS IN MATHS Find a + b When a=1 and b=2 1 2 = 3

4. If a = 10 and b = 20 what is the value of a + b ? 1030 200

5. If c = 100 and d = 70 what is the value of c – d ? 302070

6. 15358

7. If p = 2 and q = 3 what is the value of pq ? 23 5 6

8. 151004

9.  What is the value of y? y = 7xwhen x = 10 y = 13 + bwhen b = 7 y = 2Q – 9 when Q = 8 y = 3c – 5when c = -1 y = 8t + 11 when t = 4 y = 12w + 12 when w = 6 y = 3r - 10when r = 3 y = B – 8 when B = 3 y = a – 4 when a = -2 y = f 2 + 7when f = 5 Mini - whiteboards

10. CONNECT 4 GAME Class in two teams  RED TEAM & GREEN TEAM Each choose a number A number will be called, that person should work out & explain the sum but they can ask their team mates to decide which to pick and how to work it out (2 minutes) If you get it wrong, the other team will win it – so don’t get it wrong The team who connects 4 first wins!

11. 3aa - 75a + 3a + 8 8bb - 34b + 2b + 6 4b + 12a5c b² 5cc - 54c + 6c + 12 a = 10 b = 5 c = 7

12. start finish Begin at start, one player should roll the dice, substitute the value into the start expression to begin. All moves after this should either be horizontal or vertical. The game ends when the first person gets to the finish. The winner is the player with the highest total score from the substitutions Substitution Game – Partners

13. If you throw a “one” which expression gives the highest score? Which expression will give a negative result? If you throw a 3 with a dice, which expression will give a 10? When using the dice why will this expression never equal 8 QUESTIONS TO THINK ABOUT