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Place Valuewith decimals through millionths

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Monday, Aug. 16th ~

• Groundworks #1 (do together as class)

• Groundworks #2 (let students do on own)

• Show ppt slides 3 and 4

• Cut out place value chart and glue (w/ glue stick) in spiral & on the back of the page, glue diff ways to write #s chart.

• Then proceed with ppt 5 and 6

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Starting with the ones place, let’s name the places together, in order, from ones to millions:

onestenshundredsthousandsten thousandshundred thousandsmillions

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onestenshundredsthousandsten thousandshundred thousandsmillions

Starting at the decimal point,the places are named in the same order except:• there is not a “ones” place• all names end in “ths”

(.) decimaltenthshundredthsthousandthsten thousandthshundred thousandthsmillionths

Now add place value chart to spiral notebook, andadd diff ways to read/write #s on another page.

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Practice (whole group…on screen)

1.http://www.thatquiz.org/tq/practice.html?placevalue (orally—with volunteers)

2. Write each number in standard form. (on a sheet of paper)

a) 83 thousand 903

b) (9 x 10,000) + (8 x 1,000) + (3 x 100) + (4 x 10) c) four hundred eighty-nine thousand, three hundred forty-one d) (5 x 100,000) + (3 x 1,000) + (7 x 10) e) 48 thousand 16 f) two hundred eight g) sixty-five billion, two million, fourteen thousand, threeAnswers to a-g are on the next slide….

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Practice Answers

2. Write each number in standard form. a) 83,903

b) 98,340 c) 489,341 d) 503,070 e) 48,016 f) 208 g) 65,002,014,003

STOP here on Mon.

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Wednesday, Aug. 18th~

• Groundworks #4 (w/ a partner)

• Compare answers w/a partner - WS “Athletes on Parade”

• Teacher will “spot check” #s 7, 8, 10, 15, 21, and 22.

• Continue on to the end of this ppt

• Then, students will do WS- Read/Write Decimals and check it in class.

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Students ~

• Use your place value chart (in your spiral notebook) to help you with today’s math problems.

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How to read and write decimals:

Write the following number in word form:

40.318

Step 1:Write the word namefor the #s to the left of or before the decimal point.

forty

Step 2 :Write and & the wordname for the #s to theright of the decimal point.

forty and three hundred eighteen

Step 3:Write the place value nameof the final digit after thedecimal point.

forty and three hundred eighteen thousandths

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Practice: try to write the following in word form.

1) 7.4005

2) 0.28067

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Check your answers

Practice: try to write the following in word form.

1) 7.4005

seven and four thousand five ten thousandths

2) 0.28067

twenty-eight thousand sixty-seven hundred thousandths

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0 . 7 2 0

th h t o . t h th

3 8 5

10

th100

th m

How would you write this # in word form?

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0 . 7 2 0

th h t o . t h th

3 8 5

10

th100

th m

Seven hundred twenty thousand, three hundred eighty-five millionths

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.

th h t o . t h th 10

th100

th m

What place is the 4 in ? 0. 00548

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0 . 0 0 5

th h t o . t h th

4 8

10

th100

th m

What place is the 4 in ? 0. 00548

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What number is in the hundred thousandths place?

8.097136

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What number is in the hundred thousandths place?

8.097136

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Try to write the following number in standard form:

Four and twenty-nine millionths

** Remember: when writing a decimal in standard form, start by placing the decimals in the correct place and then work backwards. Use your chart in your spiral notebook to help you write this number.

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4.000029the nine is in the millionths place

Four and twenty-nine millionths

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4 . 0 0 0

th h t o . t h

4.000029

th

0 2 9

10

th100

th m

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Now, try some more practice

http://www.thatquiz.org/tq/practice.html?placevalue

Note to teacher: Change the level to 6 and change the answers to just decimals.Have the students practice these questions out loud.