First, round 54 to 50 and 27 to 30. Then multiply: 50 × 30 = 1,500. The estimated product is 1,500. | Card: 2 / 42 |
Round 82 to 80 and 19 to 20. Then multiply: 80 × 20 = 1,600. The estimated product is 1,600. | Card: 4 / 42 |
True or False: Estimation is less useful than exact calculations in real-world situations. | Card: 5 / 42 |
False. Estimation helps in making quick decisions and checking the reasonableness of answers. | Card: 6 / 42 |
Fill in the blank: To estimate products, you first round each factor to the nearest ___. | Card: 7 / 42 |
Compare the estimate to the original numbers and consider whether you rounded up or down. | Card: 10 / 42 |
Round 36 to 40 and 58 to 60. Then multiply: 40 × 60 = 2,400. The estimated product is 2,400. | Card: 12 / 42 |
Round 45 to 50 and 78 to 80. Then multiply: 50 × 80 = 4,000. The estimated product is 4,000. | Card: 16 / 42 |
If a baker needs to estimate how many muffins they will make with 48 trays and 22 muffins per tray, what is the estimated total? | Card: 19 / 42 |
Round 48 to 50 and 22 to 20. Then multiply: 50 × 20 = 1,000. The estimated total is 1,000 muffins. | Card: 20 / 42 |
Fill in the blank: When rounding, if the ones digit is 0, 1, 2, 3, or 4, you round ___ to the nearest ten. | Card: 21 / 42 |
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Round 76 to 80 and 34 to 30. Then multiply: 80 × 30 = 2,400. The estimated product is 2,400. | Card: 24 / 42 |
True or False: An estimate should be exact and always equal to the actual product. | Card: 25 / 42 |
Look at the ones digit, which is 9. Since 9 is 5 or greater, round up: 89 rounds to 90. | Card: 28 / 42 |
If a school orders 53 boxes of pencils, each containing 29 pencils, what is the estimated total number of pencils? | Card: 29 / 42 |
Round 53 to 50 and 29 to 30. Then multiply: 50 × 30 = 1,500. The estimated total is 1,500 pencils. | Card: 30 / 42 |
Fill in the blank: When estimating products, you multiply the rounded numbers and write your ___. | Card: 31 / 42 |
Round 63 to 60 and 47 to 50. Then multiply: 60 × 50 = 3,000. The estimated product is 3,000. | Card: 34 / 42 |
True or False: Estimation involves complex calculations and is not useful for mental math. | Card: 35 / 42 |
Round 25 to 30 and 19 to 20. Then multiply: 30 × 20 = 600. The estimated product is 600. | Card: 38 / 42 |
76 rounds to 80 and 29 rounds to 30. Therefore, 80 × 30 = 2400. The estimated product is 2400. | Card: 40 / 42 |
If a recipe requires 24 eggs for 6 servings, how many eggs are needed for 10 servings? Estimate the number of eggs needed. | Card: 41 / 42 |
40 eggs are needed.
| Card: 42 / 42 |






