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Lesson 16

Lesson 16. Rounding Whole Numbers Estimating. Notes. Mental Math. Links. Activity. Proficiency. Homework. Practice. 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.

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Lesson 16

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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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