Problem (Page 88). In a group of nine coins, eight weigh the same ...
Problem (Page 88). In a group of nine coins, eight weigh the same ...
Problem (Page 88). In a group of nine coins, eight weigh the same ...
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38 3. WHOLE NUMBERS: OPERATIONS AND PROPERTIES(2) Rectangular array approach3 + 3 + 3 + 3 + 3 = 15 or 5 ⇥ 3 = 15Definition (Multipication - Rectangular Array Approach).Let a and b be any whole numbers. Then ab is <strong>the</strong> number <strong>of</strong> elements in arectangular array having a rows and b columns.(3) Cartesian Product Approach2 ⇥ 3 = 6Definition (Multipication - Cartesian Product Approach).Let a and b be any whole numbers. If a = n(A) and b = n(B) for some sets Aand B,ab = n(A ⇥ B).
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