Multiply Whole Numbers 5 NBT 5 Fluently multiply
Multiply Whole Numbers 5. NBT. 5 Fluently multiply multi-digit whole numbers (up to three-digit by four-digit factors) using appropriate strategies and algorithms.
Learning Targets • I can multiply a three-digit number by a two-digit number using standard algorithm. • I can multiply a four-digit number by a two-digit number using standard algorithm. • I can use an area model to verify my products. Repeat after me.
Our Goal Solve the expressions using area model or standard algorithm. 1. ) 34 x 224 2. ) 2, 454 x 18
Vocabulary • Algorithm • Product • Multiply • Distribute • Fluent
Watch Me Standard Algorithm A print shop can make 32 copies per minute. How many copies can the print shop make in 480 minutes?
Watch Me Area Model A print shop can make 32 copies per minute. How many copies can the print shop make in 480 minutes?
You Try & I will Help Find the product using standard algorithm. Then, check using area model. 1. ) 342 x 61 2. ) 621 x 85 1. ) Write 392. 5 in expanded and word form. 2. ) What is forty-seven and eleven thousandths written in standard form?
Work with Me Use your knowledge of place value to write the expression in the correct box. 48 x 352 22 x 227 Product is less than 10, 000 Product is greater than 10, 000
You Try & I will Help Use the strategy of your choice, whichever you are fluent in to find the product. 1. ) 132 x 25 2. ) 232 x 54 3. ) 129 x 31
You Try a Few More Use the strategy of your choice, whichever you are fluent in to find the product. 1. ) 257 x 60 2. ) 493 x 57
Partner Talk Consider the area model of 452 x 19. What is the product of 452 x 19, and why? a) b) c) d) 4, 520 because 4, 000 + 3, 600 + 500 + 450 + 20 + 18 = 4, 250 4, 520 because 4, 000 + 500 + 20 – 3, 600 + 450 + 18 = 4, 250 8, 588 because 4, 000 + 3, 600 + 500 + 450 + 20 + 18 = 8, 588 because 4, 000 + 500 + 20 – 3, 600 + 450 + 18 = 8, 588
Partner Talk
Analyze my Work Partner Talk Explain why my product is not reasonable. What do you think my error was?
Partner Talk Find each product. Write the expression in the correct box. 421 x 17 121 x 62 21 x 565 72 x 364 Product is less than 10, 000 Product is greater than 10, 000
Formulate a Prediction Partner Talk How will an area model look different when we multiply 1, 474 x 27? How will our standard algorithm look different when we multiply 1, 474 x 27?
Learning Targets • I can multiply a two-digit number by a two-digit number using standard algorithm. • I can multiply a three-digit number by a two-digit number using standard algorithm. • I can multiply a four-digit number by a two-digit number using standard algorithm. • I can use an area model to verify my products. Repeat after me.
Watch Me Standard Algorithm There are 1, 474 seats in each of the 27 sections of an arena. How many seats are there in all?
Watch Me Area Model There are 1, 474 seats in each of the 27 sections of an arena. How many seats are there in all?
You Try & I will Help Find the product using standard algorithm. Then, check using area model. 1. ) 1, 342 x 61 2. ) 2, 621 x 85 True or False: (5 x 10) + (9 x 1/10) > (5 x 10) + (9 x 1/100) Explain the steps you take to solve this problem.
Partner Talk Which has a product greater than 76, 032? How do you know? a) 4, 752 x 16 Or b) 794 x 96 True or False: (1 x 100) + (2 x 1/10) > (1 x 100) + (2 x 1)
Can you hit the targets? ? Can you multiply a two-digit number by a two-digit number using standard algorithm? ! ! Can you multiply a three-digit number. T by a two-digit number I using standard algorithm? E V O R number by a two-digit Can you multiply. P a four-digit number using standard algorithm? Can you use an area model to verify my products?
Exit Ticket Solve the expression using area model or standard algorithm. 1. ) 34 x 224
Exit Ticket Solve the expression using area model or standard algorithm. 2. ) 2, 454 x 18
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