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Published byPamela Day Modified over 6 years ago

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Find the value of each expression. 1. 2. 4.7 + 5.08 3. 4. 5. 10 – 3.58

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Rational Number: ◦ a fraction made from integers Sum: ◦ ADD Difference: ◦ Subtract Rounding: ◦ Choose easy #’s close to hard #’s.

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Decimals less than one ◦ round to 0, 0.5 or 1 more than one ◦ round to the nearest integer (whole #) Fractions less than one ◦ round to 0, ½ or 1 mixed numbers ◦ round to the nearest integer (whole #)

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0.2 rounds to ________ 0.4 rounds to ________ 0.7 rounds to ________ 0.75 rounds to ________ 1.6 rounds to ________ ¼ rounds to _________ 1/3 rounds to _________ 3/5 rounds to _________ 1 ¾ rounds to _________

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Estimate the value of – 4.23 + 2.8. Both numbers are more than one and should be rounded to nearest integer. ◦ – 4.23 → – 4 ◦ 2.8 → 3 – 4 + 3 = –1 – 4.23 + 2.8 ≈ –1

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Estimate the value of 0.94 – (–0.43). Both numbers are less than one unit away from zero and should be rounded to the nearest 0.5. ◦ 0.94 → 1 ◦ – 0.43 → – 0.5 1 – (–0.5) = 1 + 0.5 = 1.5 0.94 – (–0.43) ≈ 1.5

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Estimate the value of. Each fraction is less than 1 unit from zero so round to the nearest.

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Estimate the value of. Each fraction is more than 1 unit from zero so round to the nearest integer.

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Estimate the value of each expression. 1. 3.21 + 6.3 2. 3. 4. 0.13 – 0.925 5. Matt bought pounds of apples, pounds of grapes and pounds of potatoes. How many pounds did he buy?

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Describe a time when you used estimating in a situation outside of math class.

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