Estimation is powerful on the ACT because: 1. The ACT is time-pressured (60 questions in 60 minutes) 2. Answer choices are often spread apart 3. Estimatio…
Estimation is powerful on the ACT because: 1. The ACT is time-pressured (60 questions in 60 minutes) 2. Answer choices are often spread apart 3. Estimation can eliminate 2-3 wrong answers instantly Strategies: - Round to friendly numbers: 297 times 4 approx 300 times 4 = 1200 - Use benchmarks: sqrt{50} is between sqrt{49} = 7 and sqrt{64} = 8, closer to 7 - Percent estimation: 15% of 82 ≈ 10% + …
Example: Estimate frac{398 times 52}{201}
If the answer choices are 45, 112, 380, and 1,200, you can often eliminate 2-3 options just by estimating the order of magnitude. This is especially useful when you're running low on time — a smart estimate beats a random guess.
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