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Understanding Rounding and Estimating in Math

Learn rounding whole numbers for estimation and mental math. Practice rounds to nearest tens, hundreds, and thousands for proficiency. Interactive activities and helpful links provided for homework and practice. Enhance mental math skills with engaging exercises.

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Understanding Rounding and Estimating in Math

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  1. Lesson 16 Rounding Whole Numbers Estimating

  2. Notes Mental Math Links Activity Proficiency Homework Practice

  3. Mental Math • Count up and down by 3’s between 3 and 36. • 4 x 75 279 + 350 • 250 - 199 $15 + $7.75 • Double $1.50 800/40 • 4 x 12, ÷ 6, x 8, - 4, ÷ 6, x 3, ÷ 2

  4. When we round a whole number, we are finding another whole number, usually ending in zero, that is close to the number we are rounding. Rounding can help us estimate the answer to a Problem. Estimating is a way to “get close” to the Answer.It can also help us decide if the answer is reasonable.

  5. Round 57 to the nearest tens • 50 • 55 • 60 • 100 • None of the above

  6. Round 45 to the nearest tens • 0 • 40 • 45 • 50 • None of the above

  7. Round 350 to the nearest hundreds • 300 • 350 • 400 • 500 • None of the above

  8. Round 4387 to the nearest thousands • 4000 • 4400 • 4500 • 5000 • None of the above

  9. Round 6750 to the nearest thousands • 6000 • 6500 • 6700 • 6800 • None of the above

  10. Round the numbers to estimate the answer703 – 598 = • 100 • 105 • 200 • 1301 • None of the above

  11. Round the numbers to estimate the answer591 / 29 = • 10 • 20 r 11 • 20 • 30 • None of the above

  12. http://www.math.com/school/subject1/practice/S1U1L3/S1U1L3Pract.htmlhttp://www.math.com/school/subject1/practice/S1U1L3/S1U1L3Pract.html

  13. Activity A dot cube has six faces. Where two faces meet, there is an edge. How many edges does a dot cube have?

  14. Lesson 59 Practice A-F Complete #’s 1-10 Fact test G

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