Rounding of Numbers Up to Hundred Millions July

Rounding of Numbers Up to Hundred Millions July 2, 2012

Objectives • Round off numbers to the nearest place value. 2

Vocabulary • Round – to replace an exact number by another that is close to it in value and easier to use. • For example, 52, rounded to the nearest ten is 50. 3

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

Round this number to the nearest ten. Find your number. 8, 647 Circle the number in the tens place.

Round this number to the nearest ten. Look right next door. 8, 647 Draw an arrow to the right of the number.

Round this number to the nearest ten. 4 or less, just ignore. 8, 647 7 is larger than 4 so go to the next line of the poem.

Round this number to the nearest ten. 5 or more, add 1 more +1 8, 647 Add 1 to the 4

Round this number to the nearest ten. 5 or more, add 1 more 8, 650 After adding 1 to the 4, all the number to the right of the 5 become 0’s

The Answer 8, 647 rounded to the nearest tens place is 8, 650 8, 647 8, 650 Note 8, 647 is closer to 8, 650 on the number line.

Round this number to the nearest hundred. Find your number. 8, 647 Circle the number in the tens place.

Round this number to the nearest hundred. Look right next door. 8, 647 Draw an arrow to the right of the number.

Round this number to the nearest ten. 4 or less, just ignore. 8, 647 Since the number is 4 we do not change the 6

Round this number to the nearest ten. 4 or less, just ignore. 8, 600 Change the number to the left of 6 to 0’s.

The Answer 8, 647 rounded to the nearest hundred place is 8, 600 8, 647 8, 700 Note 8, 647 is closer to 8, 600 on the number line.

Round these numbers to the nearest ten. 139 140 45 50 282 280 97 100

Round these numbers to the nearest hundred. 2, 1 3 9 2, 1 0 0 1 9, 7 4 5 1 9, 7 0 0 282 300 3, 1 9 7 3, 2 0 0

Round these numbers to the nearest thousand. 2, 8 3 9 3, 0 0 0 1 9, 4 4 5 1 9, 0 0 0 8, 9 8 2 9, 0 0 0 4 3, 1 9 7 4 3, 0 0 0

Round these numbers to the nearest ten thousand. 2 2, 8 3 9 2 0, 0 0 0 3 1 9, 4 4 5 3 2 0, 0 0 0 4 8, 9 8 2 5 0, 0 0 0 1 4 3, 1 9 7 1 4 0, 0 0 0

Round these numbers to the nearest million. 2 2, 8 3 9, 231 23, 000 3 1 9, 4 4 5, 012 319, 000 4 8, 9 8 2, 376 49, 000 1 4 3, 1 9 7, 212 143, 000