Write Related Facts MAFS.3.OA.1.4.

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Presentation transcript:

Write Related Facts MAFS.3.OA.1.4

Write as many equations as you can to represent the array below. Lesson Opening Write as many equations as you can to represent the array below.

Can you write TWO multiplications facts for the array? Write Related Facts Can you write TWO multiplications facts for the array? 3 12 4

Can you write TWO multiplications facts for the array? Write Related Facts Can you write TWO multiplications facts for the array? 3 3 x 4 = 12 12 4

Can you write TWO multiplications facts for the array? Write Related Facts Can you write TWO multiplications facts for the array? 3 3 x 4 = 12 4 x 3 = 12 4

Can you write a division fact for the array? Write Related Facts Can you write a division fact for the array? 3 3 x 4 = 12 4 x 3 = 12 12 4

Can you write a division fact for the array? Write Related Facts Can you write a division fact for the array? 3 3 x 4 = 12 4 x 3 = 12 12 ÷ 4 = 3 12 4

Can you write another division fact for the array? Write Related Facts Can you write another division fact for the array? 3 3 x 4 = 12 4 x 3 = 12 12 ÷ 4 = 3 12 ÷ 3 = 4 12 4

What patterns do you notice? Write Related Facts What patterns do you notice? 3 3 x 4 = 12 4 x 3 = 12 12 ÷ 4 = 3 12 ÷ 3 = 4 12 4

What patterns do you notice? Write Related Facts What patterns do you notice? 3 x 4 = 12 4 x 3 = 12 12 ÷ 4 = 3 12 ÷ 3 = 4 Number of rows x number of columns = total squares Number of columns x number of rows = total squares Total squares ÷ number of columns = number of rows Total squares ÷ number of rows = number of columns 3 12 4

What number goes in the blank? Your Turn Write the related facts for the following problem. Feel free to keep the blank or insert the correct number in the blank. 5 × 7 = __ 35 What number goes in the blank? 7 × 5 = __ 35 __ ÷ 5 = 7 35 __ ÷ 7 = 5 35

What number goes in the blank? Your Turn Write the related facts for the following problem. Feel free to keep the blank or insert the correct number in the blank. 6 × __ = 24 4 What number goes in the blank? __ × 6 = 24 4 24 ÷ 6 = __ 4 24 ÷ __ = 6 4

What number goes in the blank? Your Turn Write the related facts for the following problem. Feel free to keep the blank or insert the correct number in the blank. __ × 3 = 21 7 What number goes in the blank? 3 × __ = 21 7 21 ÷ 3 = __ 7 21 ÷ __ = 3 7

Can you write the related facts for a word problem? Susanna has 12 math problems for homework. She decides to work on just 3 problems every hour. How many hours does it take her to finish all her math problems? 12 ÷ 3 = __ 4 What number goes in the blank? 3 × __ = 12 4 __ × 3 = 12 4 12 ÷ __ = 3 4

Can you write the related facts for a word problem? Lali eats 2 cups of dog food every day. How many cups of dog food does Lali eat each week? 2 × 7 = __ 14 What number goes in the blank? 7 × 2 = __ 14 __ ÷ 2 = 7 14 __ ÷ 7 = 2 14

Your Turn On the practice page, write the related facts for the: Array Equation Picture Word problem

Exit Ticket 28 ÷ 7 = __ 7 × __ = 28 __ × 28 = 7 28 ÷ __ = 7 Choose all the equations you could use to help you solve the problem below. Betul jogs 28 miles in one week. She jogs the same number of miles each day in the week. How many miles does she jog each day? 28 ÷ 7 = __ 7 × __ = 28 __ × 28 = 7 28 ÷ __ = 7 __ × 7 = 28 7 ÷ 28 = __ Solve the problem first. Then, write all the related facts for the equation you used to solve the problem.