# Math Flash Rounding By Monica Yuskaitis Use rounding

- Slides: 30

Math Flash Rounding By Monica Yuskaitis

Use rounding 1. When the question asks you to estimate. 2. When the question asks “about how many”…? 3. When an exact answer isn’t possible. 4. When an answer is difficult to obtain.

Memorize this Poem -Find your number. -Look right next door. -4 or less just ignore. -5 or more, add 1 more.

Round this number to the nearest ten thousand. Find your number. -3 6 8, 9 7 1 -Circle the number in the ten thousands place.

Round this number to the nearest ten thousand. -Look right next door. -3 6 8, 9 7 1 Draw an arrow to the right of the number.

Round this number to the nearest ten thousand. -4 or less, just ignore. -3 6 8, 9 7 1 8 is larger than 4 so go to the next line of the poem.

Round this number to the nearest ten thousand. 5 or more, add 1 more. +1 3 6 8, 9 7 1 Add 1 to the 6.

Round this number to the nearest ten thousand. 5 or more, add 1 more. 3 7 0, 0 0 0 Add 1 to the 6 and all the numbers to the right of the 7 become 0’s.

The Answer 368, 971 rounded to the nearest ten thousand is 3 7 0, 0 0 0

Round this number to the nearest thousand. Find your number. 3 5, 3 2 7 Circle the number in the thousands place.

Round this number to the nearest thousand. Look right next door. 3 5, 3 2 7 Draw an arrow to the right of the number.

Round this number to the nearest thousand. 4 or less, just ignore. 3 5, 3 2 7 Since 3 is less than 4 we do not change the 5.

Round this number to the nearest thousand. 4 or less, just ignore. 3 5, 0 0 0 Change the numbers to left of 5 to 0’s.

The Answer 35, 327 rounded to the nearest thousand is 3 5, 0 0 0

Round this number to the nearest dollar. Find your number. $ 5. 8 7 Circle the number where the dollars are.

Round this number to the nearest dollar. Look right next door. $ 5. 8 7 Draw an arrow to the right of the circled number.

Round this number to the nearest dollar. 4 or less, just ignore. $ 5. 8 7 8 is greater than 4 so go to the next line of the poem.

Round this number to the nearest dollar. 5 or more, add 1 more. +1 $ 5. 8 7 Since 8 is greater than 5 add 1 to the 5.

Round this number to the nearest dollar. 5 or more, add 1 more. $ 6. 0 0 Change the 5 to a 6 and change all the numbers to the right to 0’s.

The Answer $5. 87 rounded to the nearest dollar is $ 6. 0 0

Round this number to the nearest tenth place. Find your number. 4. 8 7 1 Circle the number in the tenths place.

Round this number to the nearest tenth place. Look right next door. 4. 8 7 1 Draw an arrow to the right of the circled number.

Round this number to the nearest tenth place. 4 or less just ignore. 4. 8 7 1 8 is greater than 4 so go to the next line of the poem.

Round this number to the nearest tenth place. 5 or more, add 1 more. +1 4. 8 7 1 Since 7 is greater than 5, add 1 to the 8.

Round this number to the nearest tenth place. 5 or more, add 1 more. 4. 9 Change the 8 to a 9 and drop the numbers to the right of the 9.

The Answer 4. 871 rounded to the nearest tenth place is 4. 9

Round 4. 95 to the closest tenth Since there is a “ 9” in the tenth spot consider the ones and tenths together…… should you leave it at 49 or move it to 50? 4. 95 rounded to the nearest tenth is 5. 0

Try these Round to tenths: Round to hundredths 4. 56 4. 6 18. 784 18. 78 5. 32 5. 3 9. 456 9. 46 0. 98 1. 0 9. 997 10. 00

Molly has $16 in her pocket She buys: • 3 hotdogs @ $1. 89 each • 3 milkshakes @ $2. 19 each • 3 Large French fries @ $ $1. 79 each Does she have enough money?

Gas costs $1. 79 per gallon I’m running on empty and I have a 20 gallon tank on my truck…… About how much will it cost to fill up?

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