1. Core Focus on Decimals & Fractions Place Value with Decimals Lesson 1.1

2. Warm-Up 1.Write 44 in word form. 2.Write 103 in word form. 3.Write two thousand, five hundred seventy-five in numerical form. 4.Write four hundred one in numerical form. forty-four 2,575 401 one hundred three

3. Place Value with Decimals Identify place value of decimals to thousandths. Lesson 1.1

4. Vocabulary Decimal A base ten number written with a decimal point. decimal decimal point Good to Know! Decimals are based on the number ten. The value and position of each digit in a decimal determine how much the decimal is worth. The decimal point separates the whole number from the part that is less than one.

5. Example 1 Write 431.25 in word form. Fill in the place-value chart for the number.

6. Example 2 Write 45.703 in word form. Fill in the place-value chart for the number.

7. Example 3 Write 0.6 in word form. Fill in the place-value chart for the number. Good to Know! When there is no whole number preceding the decimal point, only the part that is less than one is read.

8. Step 1Set out base-ten blocks for the decimal 1.34 and fill in a place-value chart. Write this number in word form. Which number is in the tenths place? Step 2Set out base-ten blocks for the decimal 4.51 and fill in a place-value chart. Write this number in word form. Which number is in the hundredths place? Step 3Set out base-ten blocks for the decimal 2.97 and fill in a place-value chart. Write this number in word form. Which number is in the hundredths place? Step 4Set out base-ten blocks for the decimal 5.09 and fill in a place-value chart. Write this number in word form. Which number is in the tenths place? Step 5Set out base-ten blocks for the decimal 3.02 and fill in a place-value chart. Write this number in word form. Which number is in the hundredths place? Step 6Set out base-ten blocks for the decimal 2.53 and fill in a place-value chart. Which number is in the tenths place?

9. Step 7Sketch a model of 2.46 as base-ten blocks on a piece of paper. Sketching shortcuts:onestenthshundredths Step 8Fill in a place-value chart with the decimal that matches your drawing. Step 9Write the word form for your decimal under the place-value chart. Step 10Repeat Steps 7-9 for at least three decimals using ones, tenths and hundredths.

10. Example 4 Write the decimal that represents two and sixty-three hundredths. Write the whole number.two = 2 Insert the decimal for “and”.two and = 2. Add the part that is less sixty-three hundredths = 2.63 than one. Two and sixty-three hundredths = 2.63

11. Communication Prompt How do base-ten blocks help you learn about decimals?

12. Exit Problems 1.In which place is the 7 in the following decimal: 2.741? 2.In which place is the 3 in the following decimal: 12.563? Write the following decimals in word form: 3.4.236 4.6.09 5.12.014 tenths place thousandths place four and two hundred thirty-six thousandths six and nine hundredths twelve and fourteen thousandths