1aef5dc2fb34ff7b84ba1dfb3a795b34.ppt

- Количество слайдов: 23

Decimals Place Value, Expanded and Standard Forms

Decimal Word Names • Decimal word names always end in “-th” or “-ths” one tenth four hundredths

Decimal Word Names • Decimal word names always end in “-th” or “-ths” one tenth four hundredths

Representing the decimal • The decimal is represented by the word “and” when writing and saying decimals in words. 2. 1 = two and one tenth

Representing the decimal • The decimal is represented by the word “and” when writing and saying decimals in words. 2. 1 = two and one tenth

What decimals are • Decimals show amounts between two consecutive counting numbers (3, 4…) 0. 45 is between 0 and 1 3. 861 is between 3 and 4 25, 196. 8 is between 25, 196 and 25, 197

How to write decimals numbers greater than one • To write a number containing a whole number and decimal fowllow these steps: A. B. C. D. Write the whole number in words Write “and” Write the numbers shown in the decimal Write the last place a digit occupies in the decimal (the farthest right)

How to write decimals numbers greater than one • To write a number containing a whole number and decimal fowllow these steps: A. B. C. D. Write the whole number in words Write “and” Write the numbers shown in the decimal Write the last place a digit occupies in the decimal (the farthest right) 32. 46 A. B. C. D. thirty-two and forty-six hundredths

To write decimals in expanded form • Write the place individually 5. 306 =

To write decimals in expanded form • Write the place individually 5. 306 = 5

To write decimals in expanded form • Write the place individually 5. 306 = 5 + 0. 3

To write decimals in expanded form • Write the place individually 5. 306 = 5 + 0. 3 + 0. 006

To write decimals in expanded form • Write the place individually 5. 306 = 5 + 0. 3 + 0. 006

To show the value of the decimal places in expanded form • Multiply the digit by the value of the corresponding place 5. 306 =

To show the value of the decimal places in expanded form • Multiply the digit by the value of the corresponding place 5. 306 = (5 x 1)

To show the value of the decimal places in expanded form • Multiply the digit by the value of the corresponding place 5. 306 = (5 x 1) + (3 x 0. 1)

To show the value of the decimal places in expanded form • Multiply the digit by the value of the corresponding place 5. 306 = (5 x 1) + (3 x 0. 1) + (6 x 0. 001)

To show the value of the decimal places in expanded form • Multiply the digit by the value of the corresponding place 5. 306 = (5 x 1) + (3 x 0. 1) +(6 x 0. 001)

To put a number in standard form • To put a number in standard (numeral) form from expanded form, just add all places together. 8 + 0. 1 + 0. 05 + 0. 003

To put a number in standard form • To put a number in standard (numeral) form from expanded form, just add all places together. 8 0. 1 0. 05 0. 003

To put a number in standard form • To put a number in standard (numeral) form from expanded form, just add all places together. + 8 0. 1 0. 05 0. 003

To put a number in standard form • To put a number in standard (numeral) form from expanded form, just add all places together. + 8 0. 1 0. 05 0. 003 8. 153

To put a number in standard form • To put a number in standard (numeral) form from expanded form, just add all places together. + 8 0. 1 0. 05 0. 003 8. 153 Note: No place should have more than one digit in this addition