advertisement

Rounding Fun! I can round decimals to the nearest given place value Let’s Round! Place Value Think in your mind how you remember the rules for rounding...on your slate, write down a trick to share with the class (be creative) I like tricks! Place Value Review On your slate, label the place value of each digit 5,678.9134 Thousands Tens Hundreds Tenths Ten-Thousandths Thousandths Hundredths Ones 2. The tenths place neighbor will tell the tenths place whattotothe do. nearest Locate thetenth Rounding neighbor- the hundredths place 3. The trick is: If the NEIGHBOR is five or more, add one more (to the place value you are rounding to) or if the NEIGHBOR is 4 or less just ignore (the place value you are rounding to) 4. The neighbor (hundredths place) is a seven, so what will happen to the tenths place? Round these numbers to the nearest tenth Try It On Your Own! 1. 675.321 2. 7,436.688 3. 12.563 4. 5.895 2. The hundredths place neighbor will tell the Rounding hundredthstoplace what to do. Locate the the nearest neighbor- the thousandths place hundredth 3. The trick is: If the NEIGHBOR is five or more, add one more (to the place value you are rounding to) or if the NEIGHBOR is 4 or less just ignore (the place value you are rounding to) 4. The neighbor (thousandths place) is a two, so what will happen to the hundredths place? Round these numbers to the nearest hundredeth Try It On Your Own! 1. 87.211 2. 5,432.999 3. 7.321 4. 16.902 Round to the nearest thousandths place Use the same rules! Find the place value you are rounding to and look to it’s neighbor to tell you what to do! - 5 or more, add one more Neighbor - 4 or less, just ignore 65.9876 thousandths place Try It On Your Own! Round these numbers to the nearest thousandth 1. 44.4388 2. 2.8943 3. 12.5655 4. 987.3329 to the $86.79 nearest ForRounding example: Round to whole the nearest whole. 1. Look at the decimal number (seventy nine hundredths) 2. Apply the same rule (5 or more, add one more. 4 or less, just ignore) 3. Since the seven in 79 is greater than five, the next place value (the ones-which is a whole number) will round up 4. $86.79 rounded to the nearest whole would be $87 Rounding to the nearest whole Let’s try another one! 1. Look at the decimal number in the number. 2. Determine which place value would be the whole number 3. Apply the same rule (5 or more, add one more. 4 or less, just ignore) • Round 6.8 pounds to the nearest whole • Round 894.3 to the nearest whole • 1,403.293 to the nearest whole Closure •On your slate, write the rules for rounding we learned and another trick that will help you remember how to round Follow-Up 1. What is 3.9724 rounded to the nearest hundredth? 2. What is 5.3184 rounded to the nearest whole number? 3. What is 5.044 rounded to the nearest tenth? 4. What is 6.68 rounded to the nearest whole number? 5. What is 2.7669 rounded to the nearest thousandth? 6. What is 4.292 rounded to the nearest whole number? 7. What is 2.83 rounded to the nearest tenth? You can do it!