Mixed operations with a pair of brackets
1 There are 3 plates of fruit. Each plate has 5 bananas and 3 apples. How many pieces of fruit are there altogether?
Each plate has a total of 8 pieces of fruit. To find the total number of pieces, we multiply 8 pieces by 3. 8 × 3 = 24 There is a total of 24 pieces of fruit. However, Carl and Letisha got different answers. Their workings are shown below.
3 × 3 + 5 = 9 + 5 = 14
3 × 5 + 3 = 15 + 3 = 18
Carl and Letisha need to add brackets as shown below. 3 × (5 + 3) or 3 × (3 + 5)
When there are brackets, always complete the operation inside the brackets first. In this case, we complete the addition first. Then we multiply the sum. 3 × (5 + 3) or 3 × (3 + 5) = 3 × (8) = 3 × (8) = 24 = 24
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28/04/2022 12:11
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