The symbol "ϕ"
The symbol ϕ represents a mathematical rule.
The rule for ϕ is “add the two numbers and then multiply their sum by the second number”.
For example, 2 ϕ 3 = (2 + 3) × 3 = 5 × 3 = 15
Work out:
1) 2 ϕ 6
2) 1/2 ϕ 3
A box of biscuits
A box of biscuits contains 36 biscuits. 20 biscuits have foil wrappers. 15 are chocolate biscuits with foil wrappers. If 9 are not chocolate and do not have a foil wrapper, then how many chocolate biscuits are there?
1)2 ϕ 6 would just be:
ReplyDelete(2 + 6) x 6 = 8 x 6 = 48.
2) 1/2 ϕ 3 would be:
(1/2 + 3) x 3 = 3.5 x 3 = 10.5