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Multiplying/Dividing Decimals by 10, 100, 1,000
Writing Numbers in Standard, Expanded, Word Form
Comparing Decimals
Rounding Decimals to Estimate
Multiplying & Dividing with Decimals
100
2.372 x 10 on a place value chart using arrows to show how the value of each digit changes
What is 23.72. (Show place value chart on board.)
100
Express in standard form (as a decimal): three thousandths
What is 0.003.
100
Use >,<, or = to compare: 13.67 and 13.673
What is 13.67 < 13.673.
100
Round 4.1 to the nearest one.
What is 4.
100
Draw an area model to solve: 6 x 2.41
What is 14.46 (show area model on board).
200
2.372 x 1,000 on a place value chart using arrows to show how the value of each digit changes
What is 2,372. (Show place value chart on board).
200
Express in standard form (as a decimal): 53/1000.
What is 0.053.
200
Use >,<, or = to compare: 0.56 and 56/100
What is 0.56 = 56/100.
200
Round 0.776 to the nearest hundredth.
What is 0.78.
200
Draw an area model to solve: 2 copies of 3.87
What is 7.74.
300
237 / 100 by moving the decimal and on a place value chart using arrows to show how the value of each digit changes.
What is 2.37. (Show on board).
300
Express in word form: 0.06
What is six hundredths
300
Use >,<, or = to compare: four and three tenths and forty-three tenths
What is four and three tenths = forty-three tenths
300
Round 32.07g to the nearest gram.
What is 32g.
300
Solve using the standard algorithm: 15.75 / 3.
What is 5.25.
400
Write the following in standard form: 30.47 x 10(4) (-->10 to the 4th).
What is 304,700.
400
Express in word form: 120.043
What is one hundred twenty and forty-three thousandths.
400
Use >,<, and = to compare: one-hundred seventy-four thousandths and 0.74
What is one-hundred seventy-four thousandths < 0.74
400
Round 9.54L to the nearest liter and to the nearest tenth of a liter.
What is 10L and 9.5L.
400
Solve using a place value chart or the standard algorithm: 71.16 / 12.
What is 5.93.
500
Solve 345 / 10(2) and 345 x 10(2). How are the answers different? Use words, numbers, or pictures to explain how the digits shift.
What is 345 / 10(2) = 3.45. In this problem you are dividing by 100, which makes the number 1/100 smaller. In 345 x 10(2) = 34,500, you are multiplying by 100. The number becomes 100 times larger than the original number.
500
Express in standard form (as a decimal): (3x1,000) + (5x100) + (6x1) + (9x1/10) + (7x1/100) + (2x1/1000)
What is 3,506.971.
500
Arrange the numbers in increasing order (smallest to largest): 4.06 4.56 4.05 4.569
What is 4.05, 4.06, 4.56, 4.569
500
Round 242.99m and 132.56m to the nearest meter. Add the rounded numbers to find an estimated sum.
What is 243m and 133m. 243 + 133 = 376m.
500
There are 0.98 grams of salt in a jar of pickles. If there are 7 equal servings of pickles in the jar, how much salt is in each serving of pickles?
What is 0.14g of salt in each serving.