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Alternate Math 1 Estimation Test Study Guide Name:_________________ Non-Calculator: Estimating with Nice Numbers Locate in your notebook: Estimating with Nice Numbers sheet 4 Estimating with Nice Numbers sheet 5 Estimating Using Nice Numbers Mini-Quiz 1. What were the nice numbers that you used on these activities? 2. What do you do to multiply by 10? 3. What do you do to multiply by 1,000? 4. What do you do to divide by 100? 5. What do you do to divide by 10,000? 6. In the new expression, what does the “-” mean? Original: 392 99.84 New Expression: 392 100 39,200 7. Write a new expression, the quick estimate, and the adjusted estimate. New Expression Quick Estimate Adjusted Estimate 15.2 9.98 152 100.13 Non-Calculator: Estimating with “Nice” Fractions Locate in your notebook: Fractions Can be “Nice” Numbers sheet 1 Using Nice Numbers to Estimate Sums sheet 2 1. How can you tell when a fraction is close to 1? Communicating with Nice Fractions sheet 3 Estimating with Nice Numbers sheet 4 (on the back of sheet 3) 2. How can you tell when a fraction is close to 21 ? 4. Estimate the sum: 12 91 13 3. How can you tell when a fraction is close to 0? 2 54 3 101 14 15 5. Write down 4 fractions are considered to be “nice” fractions? 6. Represent the following situations with a nice fraction. Michaela made 9 baskets out of 35 shots 7. Kevin made 11 putts out of 16 Estimate each answer by using a nice number that is easy to divide. 31 of $27.85 61 of $35.49 How much would you save if you bought a $31.38 sweater that was 3 4 off? Non-Calculator: Using Compatible Numbers Locate: Using Compatible Numbers sheet 1 Compatible Numbers with Fractions and Percentages sheet 2 1. What was the strategy for these types of problems? 2. Estimate by choosing compatible numbers. Write your new expression and your estimate. New Expression Estimate 82 9.1 3590 68 4100 810 Calculator: Calculators and Estimation Locate: Calculators and Estimation sheet 1 Calculators and Estimation sheet 2 Calculators and Estimation sheet 3 1. Find the second factor so that your product or quotient falls in the given range. Start Range Number of Tries 21 _____ (1800, 1900) _____________ 50 _____ (20, 23) _____________ 400 _____ (20, 30) _____________ 9 ____ (110, 130) _____________ 2. What does the word successive mean? 3. Use a start number and successive multiplication or division to obtain a product in the given range. Record each product in the spaces provided. Start 62 x ____ Range (7000, 7010) __________ __________ __________ __________ __________ __________ ________ 1015 ÷ ____ (10, 20) __________ __________ __________ __________ __________ __________ _________ # of steps