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CEMC Fermat, 2020 Difficulty 1.1 Junior Find the answer Canada
The value of 3 × 2020 + 2 × 2020 − 4 × 2020 3\times 2020 + 2\times 2020 - 4\times 2020 3 × 2020 + 2 × 2020 − 4 × 2020
6060 6060 6060 4040 4040 4040 8080 8080 8080 0 0 0 2020 2020 2020
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A number or a short expression. Fractions can be typed as 3/2, and spacing doesn't matter.
Solution Calculating, 3 × 2020 + 2 × 2020 − 4 × 2020 = 2020 × ( 3 + 2 − 4 ) = 2020 × 1 = 2020 3 \times 2020 + 2 \times 2020 - 4 \times 2020 = 2020 \times (3 + 2 - 4) = 2020 \times 1 = 2020 3 × 2020 + 2 × 2020 − 4 × 2020 = 2020 × ( 3 + 2 − 4 ) = 2020 × 1 = 2020 3 × 2020 + 2 × 2020 − 4 × 2020 = 6060 + 4040 − 8080 = 10 100 − 8080 = 2020 3 \times 2020 + 2 \times 2020 - 4 \times 2020 = 6060 + 4040 - 8080 = 10\,100 - 8080 = 2020 3 × 2020 + 2 × 2020 − 4 × 2020 = 6060 + 4040 − 8080 = 10 100 − 8080 = 2020
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