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10 cards from this deck
Mathematical rule showing relationship between quantities
Word formula and algebraic formula
Use first letter of quantity name where appropriate
Units (e.g., T is cooking time in minutes)
25a25a25a
T=25w+30T = 25w + 30T=25w+30 (T=time in min, w=weight in kg)
C=80+0.5mC = 80 + 0.5mC=80+0.5m (C=cost in £, m=miles; 50p = £0.50)
P=6sP = 6sP=6s (P=perimeter, s=side length)
Mixing units - must keep all quantities in same units
In definitions only, not in algebraic expression itself
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