## Estimation

### Mathematics, Grade 6

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#### Study Guide Estimation Mathematics, Grade 6

ESTIMATION Estimation is the process of rounding a number either up or down to the nearest place value requested. Estimation makes it easier to perform mathematical operations quickly. How to use estimation: The rule for estimating numbers is based on what place value the number is to be rounded. Once it is determined what place value a number is to be rounded, look at the number to the right of the place value. If this number is 5 or higher, round up. If this number is 4 or below, round down. Example: Round 352 to the nearest hundred 352 Check number to the right of hundreds place 5 round up →400 If you are estimating when place value is not stated, round to the nearest ten if it is a two digit number, nearest hundred if a three digit number etc. When estimating cost, the cost is usually rounded to the nearest whole dollar. Estimating can be done with word problems like commission, and also with finding the area, perimeter and circumference. Try this! 1. Estimate 464 to the nearest hundred. 2. Estimate 18% of 200. 3. Estimate the cost of two items that cost \$1.83 each. 4. Estimate the area of a rectangle with a length of 54 and a width of 23. 5. Estimate how many pencils 22 children would get if there were 239 pencils in all. © Copyright NewPath Learning. All Rights Reserved. Permission is granted for the purchaser to print copies for non-commercial educational purposes only. Visit us at www.NewPathLearning.com.