Topic E multiplying decimals STANDARD - 5.NBT.2, 5.NBT.3, 5.NBT.7.

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Presentation transcript:

Topic E multiplying decimals STANDARD - 5.NBT.2, 5.NBT.3, 5.NBT.7

Objective: M ultiply a decimal fraction by single- digit whole numbers, including using estimation to confirm the placement of the decimal point. Grade 5 Module 1 Lesson 12

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

Fluency Practice (12 minutes)

1 minutes Do as many problems as you can. Do your personal best. Take your mark! Get set! THINK! Add Decimals SPRINT A 5.NBT.7 9 minutes

1 minutes Do as many problems as you can. Do your personal best. Take your mark! Get set! THINK! Add Decimals SPRINT B 5.NBT.7 9 minutes

Find the Product 5.NBT.7 3 minutes 4 x 2 = 4 x 0.2 = 4 x 0.02 =

5 x 3 = 5 x 0.3 = 5 x 0.03 =

3 x 2 = 3 x 0.03 = 3 x 0.23 = 2 x 0.14 =

Application Problem (8 minutes) Patty buys 7 juice boxes a month for lunch. If one juice costs $2.79, how much money does Patty spend on juice each month? Use an area model to solve.

Concept Development (30 minutes)

Multipling Decimals 31 x 4 = 3.1 x 4 = 0.31 x 4 = How are these problems alike?

Problem 1 31 x 4 = 3 tens + 1 one 412 tens 4 ones = 124 answer

Problem x 4 = 3 ones + 1 tenth 4 12 ones 4 tenths = 12.4 answer

Problem x 4 = 3 tenths + 1 hundredths 412 tenths 4 hundredths =.124 answer

Problem x 6 = 5 1 tenth x answer

Problem x 4 = tenth x answer

Problem x 3 = 7 8 tenth x answer

Problem x 4 =

Problem x 5 =

Problem x 6 = 2,

Problem x 4 = ,932 reasonable answer area model 7 tenths + 3 hundredths + 3 thousandths 28 tenths hundredths 12 thousandths = thousandths x vertical multiplication

Problem x 4 = 42, reasonable answer thousandths x vertical multiplication 1 ten + 0 ones + 7 tenths + 3 hundredths + 3 thousandths = _________________ area model

Problem x 4 = 22, reasonable answer thousandths x vertical multiplication 5 ones + 7 tenths + 3 hundredths + 3 thousandths = _________________ area model

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

Student Debrief (10 minutes) How does the area model help you to justify the placement of the decimal point for the product in 1b? How can whole number multiplication help you with decimal multiplication?

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

HOMEWORK