1.1 Problem Solving with Fractions. Addition words Plus, more, more than, added to, increased by, sum, total, sum of, increase of, gain of Subtraction words Less, subtract, subtracted from, difference, less than, fewer, decreased by, loss of, minus, take away.
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I = PRT
M = P(1 + RT)
G = NP
S = C + M
Interest = principal x rate x time
Gross sales = number of items sold x price per item
Selling price = cost of the item + markup
Example: Solve for T in the formula:
Subtract P from both sides
Divide by PR