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Topic C P lace value and rounding decimal fractions. STANDARD - 5.NBT.4. Grade 5 Module 1 Lesson 7. Objective: R ound a given decimal to any place value place value understanding and the vertical number line. MATERIALS NEEDED FOR THIS LESSON. Student. Student Pages.
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Topic C Place value and rounding decimal fractions STANDARD - 5.NBT.4
Grade 5 Module 1 Lesson 7 Objective: Round a given decimal to any place value place value understanding and the vertical number line.
MATERIALS NEEDED FOR THIS LESSON Student Student Pages Place Value Chart Personal White Boards Sprint A & B Problem Set Exit Ticket Homework Teacher Teacher Pages
Find the Midpoint 7 minutes 5.NBT.4 SPRINT A 1 minutes Do as many problems as you can. Do your personal best. Take your mark! Get set! THINK!
Find the Midpoint 5.NBT.4 SPRINT B 1 minutes Do as many problems as you can. Do your personal best. Take your mark! Get set! THINK!
Compare Decimal Fractions 2 minutes 5.NBT.3b 12.57 12.75 67 100 0.67 83 100 0.084
328.2 328.099 4.07 forty-seven tenths twenty-four and 9 thousandths 3 tens
Rename the Units 3 minutes 5.NBT.2 1.5 = ____ tenths 2.5 = ____ tenths 12.5 = ____ tenths 17.5 = ____ tenths
27.5 = ____ tenths 24.5 = ____ tenths 24.3 = ____ tenths 42.3 = ____ tenths
Application Problem (8 minutes) Craig, Randy, Charlie, and Sam ran in a 5k race on Saturday. They were the top 4 finishers. Here are their race times: Craig: 25.9 minutes Randy: 32.2 minutes Charlie: 32.28 minutes Sam: 25.85 minutes Who won first place? Who won second place? Third? Fourth?
Problem 1 Strategically decompose a whole number using multiple units to round to the nearest ten and nearest hundred decompose 155
round 155 to the nearest tens? 16 tens = 160 15 tens + 7 ones 15 ten + 5 ones = 155 15 tens = 150
round 155 to the nearest hundreds? 2 hundreds = 200 155 1 hundred + 5 tens = 150 1 hundred = 100
Problem 2 Strategically decompose a decimal number to round to the nearest whole and nearest tenth. decompose 1.57
Round 1.57 to the nearest tenth 16 tenths = 1.60 15 tenths + 7 hundredths = 1.57 15 tenths + 5 hundredths = 1.55 15 tenths = 1.50
Problem 3 Strategically decompose a decimal number to round to the nearest ten, one, tenth, and hundredth decompose 4.381
1 ten = 10 Round to the nearest tens 5 ones = 5 4 ones +381 0 tens = 0
Round to the nearest ones 5 ones = 5 4 ones + 5 tenths = 4.5 4 ones +381 4 ones = 4
44 tenths = 4.4 Round to the nearest tenths 43 tenths + 81 thousandths 43 tenths + 5 hundredths 43 tenths = 4.3
439 hundredths = 4.39 Round to the nearest hundredths 438 hundredths + 5 thousandths 438 + 1 thousandths 438 hundredths = 4.38
Problem 4 Strategically decompose to round a number to the nearest one, tenth, and hundredth
Round to the nearest one 10 ones = 10 9.975 9.5 9 ones = 9
Round to the nearest tenth 100 tenths = 10 9.975 9.95 99 tenths = 9.9
thousandths tens tenths hundredths ones 9 9 9 9 7 99.799 99 7 9 9 9 997 9 9979 9 99799 Round to the nearest tens 998 hundredths = 9.98 9.975 997 hundredths = 9.97
99.799 thousandths tens tenths hundredths ones 9 9 9 9 7 99 7 9 9 Round to the nearest tens 9 997 9 9979 9 99799 10 tens = 100 99.799 95 9 tens = 90
99.799 thousandths tens tenths hundredths ones 9 9 9 9 7 99 7 9 9 Round to the nearest ones 9 997 9 9979 9 99799 100 ones = 100 99.799 99.5 99 ones = 99
99.799 thousandths tens tenths hundredths ones 9 9 9 9 7 99 7 9 9 Round to the nearest tenth 9 997 9 9979 9 99799 998 tenths = 99.8 99.799 99.75 997 tenths = 99.7
99.799 thousandths tens tenths hundredths ones 9 9 9 9 7 99 7 9 9 Round to the nearest hundredths 9 997 9 9979 9 99799 9980 hundredths = 99.80 99.799 99.795 9979 hundredths = 99.79
Problem Set (10 minutes) Do Your Personal Best (Complete independently!)
Student Debrief (10 minutes) In #2 which decomposition helps you most if you want to round to the hundredths place? The tens place? Ones place? Why? How was #1 different from both #2 and #3?
EXIT TICKET (3 minutes) Complete the exit ticket and turn in...