Reading and Writing Decimals MCC 5 NBT 3

Reading and Writing Decimals MCC 5. NBT. 3 – READ, WRITE, AND COMPARE DECIMALS TO THOUSANDTHS. READ AND WRITE DECIMALS TO THOUSANDTHS USING BASE-TEN NUMERALS, NUMBER NAMES, AND EXPANDED FORM, E. G. , 347. 392 = 3 X 100 + 4 X 10 + 7 X 1 + 3 X (1/10) + 9 X (1/100) + 2 X (1/1000). Adapted from www. worldofteaching. com/powerpoints/maths/Decimals. ppt by Deanna Cross

How do you read decimals? To read a decimal correctly, first find the decimal point Whole numbers are to the left of the decimal point; any numbers to the right of a decimal point form a decimal fraction Say “and” for the decimal point The decimal 2164. 511 is read as “two thousand, one hundred sixty-four and five hundred eleven thousandths”

Zeros after the decimal point Writing extra zeros after the decimal point does not change the value! The decimals 0. 2, 0. 20, and 0. 200 are equivalent decimals

Practice HERE ARE SOME PRACTICE PROBLEMS IN WHICH I WILL WORK THROUGH WITH YOU TO MAKE SURE THAT YOU UNDERSTAND THE MAIN CONCEPTS COVERED.

Decimals from Word Form Write the decimals. 1. Five thousandths 2. Ninety-four thousandths 3. Three hundred thirty-six and sixty-nine hundredths 4. Three and five hundredths 5. One hundred fifty two thousandths

Convert Decimal to Words Write each decimal in words. 1. 7884. 011 2. 5592. 4 3. 4. 203 4. 612. 250 5. 10. 44

Decimals in Expanded Form Write the decimal in expanded form 1. 523. 78 2. 73. 09 3. 1, 983. 29 4. 79, 000. 021 5. 0. 982

Convert Expanded Form to Base Ten Form 1. (3 x 100) + (2 x 10) + (9 x ) + (8 x ) 2. (7 x 1000) + (3 x 100) + (9 x 1) + (1 x 3. (5 x 10) + (2 x 1) + (8 x ) + (7 x ) )

Identify Place Value In what place (on the place value chart) is the underlined digit? Write the answer. 1. 1. 475 2. 3. 763 3. 7780. 215 4. 412. 407 5. 902. 103