Topic D adding and subtracting decimals STANDARD - 5.NBT.2, 5.NBT.3, 5.NBT.7.
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Transcript of Topic D adding and subtracting decimals STANDARD - 5.NBT.2, 5.NBT.3, 5.NBT.7.
Topic Dadding and subtracting decimals
STANDARD - 5.NBT.2, 5.NBT.3, 5.NBT.7
Objective: Add decimals using place value strategies and relate those strategies to a written method.
Grade 5Module 1 Lesson 9
MATERIALS NEEDEDFOR THIS LESSON
Personal White Boardsplace value disks
Teacher
Student
Teacher Pages
Student Pages
Sprint A & BProblem SetExit TicketHomework
Fluency Practice (14 minutes)
1 minutesDo 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 minutesDo 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
6.358
Say the numberHow many tenths?_____ tenths _____ hundredths
7.354
Say the numberHow many tenths?_____ tenths _____ hundredths
Round to Different Place Vlaues
5.NBT.4 2 minutes
2.475 Say the number?Round to the nearest tenthRound to the nearest hundredth
2.987Say the number?Round to the nearest tenthRound to the nearest hundredth
One Unit More
5.NBT.7 2 minutes
5 tenths 5 hundredths5 thousandths
Say the decimal that's one tenth more ..
8 hundredths 3 tenths2 thousandths
Say the decimal that's one tenth more ..
What is one more thousandth
0.052
What is one more tenth more than
35 hundredths
What is 1 thousandth more than
35 hundredths
What is one hundredths more than
438 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
1.8 + 3 tenths
ones tenths hundredths thousandths
Problem 5
adding decimals
1 hundred 8 hundredths + 2 ones 4 hundredths
ones tenths hundredths thousandthstenshundreds
Problem 6
adding decimals
148 thousandths + 7 ones 13 thousandths
ones tenths hundredths thousandthstenshundreds
Problem 7
adding decimals
0.74 + 0.59
ones tenths hundredths thousandthstenshundreds
Problem 8
adding decimals
7.048 + 5.196
ones tenths hundredths thousandthstenshundreds
Problem 9
adding decimals
7.44 + 0.774
ones tenths hundredths thousandthstenshundreds
Problem Set (10 minutes)
Do Your Personal Best (Complete independently!)
Student Debrief (10 minutes)
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