Topic D adding and subtracting decimals STANDARD - 5.NBT.2, 5.NBT.3, 5.NBT.7

Objective: A dd decimals using place value strategies and relate those strategies to a written method. Grade 5 Module 1 Lesson 9

MATERIALS NEEDED FOR THIS LESSON P ersonal White Boards place value disks Teacher Student Teacher Pages Student Pages Sprint A & B Problem Set Exit Ticket Homework

Fluency Practice (14 minutes)

1 minutes Do as many problems as you can. Do your personal best. Take your mark! Get set! THINK! Round to the Nearest One SPRINT A 5.NBT.4 8 minutes

1 minutes Do as many problems as you can. Do your personal best. Take your mark! Get set! THINK! Round to the Nearest One SPRINT B 5.NBT.4

Decompose the Unit 5.NBT.1 2 minutes Say the number How many tenths? _____ tenths _____ hundredths

7.354 Say the number How many tenths? _____ tenths _____ hundredths

Round to Different Place Vlaues 5.NBT.4 2 minutes Say the number? Round to the nearest tenth Round to the nearest hundredth

2.987 Say the number? Round to the nearest tenth Round to the nearest hundredth

One Unit More 5.NBT.7 2 minutes 5 tenths 5 hundredths 5 thousandths Say the decimal that's one tenth more..

8 hundredths 3 tenths 2 thousandths Say the decimal that's one tenth more..

What is one more thousandth What is one more tenth more than 3 5 hundredths What is 1 thousandth more than 3 5 hundredths

What is one hundredths more than 4 38 thousandths

Application Problem Ten baseballs weigh 1,417.4 grams. About how much does 1 baseball weigh? Round your answer to the nearest tenth of a gram. Round to the nearest gram. If someone asked you, "About how much does a baseball weigh?" which anser would you give? Why? (5 minutes)

Concept Development (31 minutes)

Problem 1 adding decimals 2 tenths + 6 tenths ones tenths hundredths thousandths

Problem 2 adding decimals 2 ones 3 thousandths + 6 ones 1 thousandths ones tenths hundredths thousandths

Problem 3 adding decimals 2 tenths 5 thousandths + 6 hundredths ones tenths hundredths thousandths

Problem 4 adding decimals tenths ones tenths hundredths thousandths

Problem 5 adding decimals 1 hundred 8 hundredths + 2 ones 4 hundredths ones tenths hundredths thousandths tens hundreds

Problem 6 adding decimals 148 thousandths + 7 ones 13 thousandths ones tenths hundredths thousandths tens hundreds

Problem 7 adding decimals ones tenths hundredths thousandths tens hundreds

Problem 8 adding decimals ones tenths hundredths thousandths tens hundreds

Problem 9 adding decimals ones tenths hundredths thousandths tens hundreds

Problem Set (10 minutes) Do Your Personal Best (Complete independently!)

Student Debrief (10 minutes) What do you notice about the sum in #2f? What are some different ways to express the sum? Did you recognize a pattern in the digits used in #2? Look at each row and column. What do you notice about the addends in letters b,d and f in #1? Explain the thought process in solving these problems. What are some different words you have used through the grades for changing 10 smaller units for 1 of the next larger units or changing 1 unit for 10 of the next smaller units? How is adding decimal fractions the same as adding whole numbers? How is it different

EXIT TICKET (3 minutes) Complete the exit ticket and turn in...

HOMEWORK