Arrays and Picture Models Dividing by 4 Dividing by 5 Dividing by - PDF document

Slide 1 / 168 Slide 2 / 168 3rd Grade Division 2015-11-03 www.njctl.org Slide 3 / 168 Slide 4 / 168 Table of Contents Click on a topic to · Arrays and Pictures go to that section. · Using Multiplication · Dividing by 1 · Dividing by 2 · Dividing by 3 Arrays and Picture Models · Dividing by 4 · Dividing by 5 · Dividing by 6 · Dividing by 7 · Dividing by 8 · Dividing by 9 Return to Dividing by 10 · Table of · Division Word Problems Contents Slide 5 / 168 Slide 6 / 168 Division Division To find out 12 ÷ 6, you can draw 6 plates and put the one egg at a Division means separating a number into equal groups. time on each plate until all 12 eggs are on plates. 12 ÷ 6 = The 12 apples were divided equally into 4 baskets. How many a pples are in each basket? How would you write the division problem?

Slide 6 (Answer) / 168 Slide 7 / 168 Division Division To find out 12 ÷ 6, you can draw 6 plates and put the one egg at a time on each plate until all 12 eggs are on plates. To find out 6 ÷ 2, you can give each toy a cupcake until their are no more cupcakes. How many cupcakes does each toy get? 12 ÷ 6 = Teacher Notes 6 ÷ 2 = Have students move eggs onto the plates. [This object is a pull tab] Slide 7 (Answer) / 168 Slide 8 / 168 Division Arrays To find out 6 ÷ 2, you can give each toy a cupcake until their are You can use an array to solve a division problem. Divide the 20 no more cupcakes. How many cupcakes does each toy get? stars into an array with 4 rows. Circle each column. How many stars are in each column? 6 ÷ 2 = Teacher Notes Have students move cupcakes to each toy one at a time. [This object is a pull tab] Slide 9 / 168 Slide 9 (Answer) / 168 1 1 Does the picture show 14 ÷ 2? Does the picture show 14 ÷ 2? Yes Yes No No x x x x x x x x x x x x x x x x x x x x Answer x x x x Yes x x x x [This object is a pull tab]

Slide 10 / 168 Slide 10 (Answer) / 168 2 What number sentence matches the picture? 2 What number sentence matches the picture? A A 10 ÷ 5 = 2 10 ÷ 5 = 2 B B 12 ÷ 2 = 6 12 ÷ 2 = 6 Neither A or B Neither A or B C C Answer A [This object is a pull tab] Slide 11 / 168 Slide 11 (Answer) / 168 3 How many equal groups can be made if there were 3 How many equal groups can be made if there were 12 eggs and I put 3 eggs in each group? 12 eggs and I put 3 eggs in each group? Answer 4 [This object is a pull tab] Slide 12 / 168 Slide 12 (Answer) / 168 4 How many equal groups can be made if there were 4 How many equal groups can be made if there were 15 buttons and I circled groups of 5 buttons? 15 buttons and I circled groups of 5 buttons? Answer 3 [This object is a pull tab]

Slide 13 / 168 Slide 13 (Answer) / 168 5 5 What is 18 ÷ 3? You may use a picture to help What is 18 ÷ 3? You may use a picture to help you. you. Answer 6 [This object is a pull tab] Slide 14 / 168 Slide 15 / 168 Key Terms Divisor- The number that divides another number Dividend-The number being divided . The dividend is typically the largest number in your fact family. Using Multiplication Quotient-The answer to a division problem Division problems can be shown in three ways. Can you point out the dividend, divisor, and quotient in each problem below? 8 Return to 16 ÷ 2 = 8 16 / 2 = 8 2 16 Table of Contents Slide 16 / 168 Slide 17 / 168 Using Multiplication to Divide Using Multiplication to Divide Division is the inverse (opposite) of multiplication. 40 ÷ 5 =? Use your multiplication facts. 2 To figure out 40 ÷ 5 = _____ Write the question _____ X 5 = 40 backwards and multiply. 1 To find the answer to a division problem on a chart, start at the divisor on left column. Follow the row to the right to find dividend. Go up to find the quotient (answer).

Slide 18 / 168 Slide 19 / 168 Complete the family of facts using the fact triangle. Then complete This is a family fact triangle for 5, 8, & 40. Below are the family of the fact family template below. facts for 5, 8, & 40. 1 1 2 3 4 5 6 9 2 3 4 5 6 9 0 8 0 8 7 7 40 32 5 8 8 4 0 8 5 5 8 4 0 _____ _____ = _____ _____ X _____ = _____ _____ _____ = _____ _____ X _____ = _____ 8 5 4 0 40 5 8 _____ X _____ = _____ _____ _____ = _____ _____ X _____ = _____ _____ _____ = _____ Slide 19 (Answer) / 168 Slide 20 / 168 Complete the family of facts using the fact triangle. Then complete Complete the family of facts using the fact triangle. Then complete the fact family template below. the fact family template below. 1 1 3 4 3 4 0 2 5 6 8 9 0 2 5 6 8 9 7 7 Teacher Notes 2 7 32 The numbers are infinity cloned. [This object is a pull tab] 3 8 _____ X _____ = _____ _____ _____ = _____ _____ X _____ = _____ _____ _____ = _____ _____ X _____ = _____ _____ _____ = _____ _____ X _____ = _____ _____ _____ = _____ Slide 20 (Answer) / 168 Slide 21 / 168 Complete the family of facts using the fact triangle. Then complete Complete the family of facts using the fact triangle. Then complete the fact family template below. the fact family template below. 1 1 3 4 9 3 4 9 0 2 5 6 8 0 2 5 6 8 7 7 6 3 2 7 Teacher Notes The numbers are infinity cloned. 9 3 [This object is a pull tab] _____ X _____ = _____ _____ _____ = _____ _____ X _____ = _____ _____ _____ = _____ _____ X _____ = _____ _____ _____ = _____ _____ X _____ = _____ _____ _____ = _____

Slide 21 (Answer) / 168 Slide 22 / 168 Complete the family of facts using the fact triangle. Then complete Complete the family of facts using the fact triangle. Then complete the fact family template below. the fact family template below. 1 1 2 3 4 5 6 9 2 3 4 5 6 9 0 8 0 8 7 7 6 3 5 4 Teacher Notes The numbers are infinity cloned. 9 [This object is a pull tab] _____ _____ = _____ _____ X _____ = _____ _____ X _____ = _____ _____ _____ = _____ _____ X _____ = _____ _____ _____ = _____ _____ X _____ = _____ _____ _____ = _____ Slide 22 (Answer) / 168 Slide 23 / 168 Complete the family of facts using the fact triangle. Then complete Complete the family of facts using the fact triangle. Then complete the fact family template below. the fact family template below. 1 1 3 4 3 4 0 2 5 6 8 9 0 2 5 6 8 9 7 7 With a partner, create your own fact triangle using a common 5 4 Teacher Notes math fact you already know! The numbers are infinity cloned. [This object is a pull tab] _____ X _____ = _____ _____ _____ = _____ _____ X _____ = _____ _____ _____ = _____ _____ X _____ = _____ _____ _____ = _____ _____ X _____ = _____ _____ _____ = _____ Slide 23 (Answer) / 168 Slide 24 / 168 Complete the family of facts using the fact triangle. Then complete the fact family template below. Click here to play a 1 3 4 9 0 2 5 6 8 7 division game. With a partner, create your own fact triangle using a common math fact you already know! Teacher Notes The numbers are infinity cloned. _____ X _____ = _____ _____ _____ = _____ [This object is a pull tab] _____ X _____ = _____ _____ _____ = _____

Slide 25 / 168 Slide 25 (Answer) / 168 6 Does 45 ÷ 9 = 5? 6 Does 45 ÷ 9 = 5? Yes Yes No No Answer Yes [This object is a pull tab] Slide 26 / 168 Slide 26 (Answer) / 168 7 Which number sentence does not belong? 7 Which number sentence does not belong? A A 60 ÷ 6 = 10 60 ÷ 6 = 10 B 60 x 6 = 10 B 60 x 6 = 10 C C 60 ÷ 10 = 6 60 ÷ 10 = 6 Answer 6 x 10 = 60 6 x 10 = 60 D D B [This object is a pull tab] Slide 27 / 168 Slide 27 (Answer) / 168 8 8 32 8 = ÷ 32 8 = ÷ Answer 4 [This object is a pull tab]

Slide 28 / 168 Slide 28 (Answer) / 168 9 9 56 ÷ 7 = 7 56 ÷ 7 = 7 Yes Yes No No Answer No [This object is a pull tab] Slide 29 / 168 Slide 29 (Answer) / 168 10 21 ? = 7 10 21 ? = 7 Answer 3 [This object is a pull tab] Slide 30 / 168 Slide 30 (Answer) / 168 ? = 21 7 ? = 21 7 11 11 Answer 3 [This object is a pull tab]

Slide 31 / 168 Slide 32 / 168 Division Facts Dividing by 1 Return to Table of Contents Slide 33 / 168 Slide 34 / 168 Dividing By 1 Dividing By 1 During their class trip all 7 of Miss Carter's students have to go on If you have 10 faces and place them in 1 row, how many faces 1 bus. How many students will be on the bus? would be in the row? 10 1 What is the division problem? Label your array. What is the answer, including the unit? 7 kids 10 ÷ 1 = 10 faces click Slide 35 / 168 Slide 36 / 168 Dividing By 1 Dividing By 1 You have learned that division is the inverse (opposite) of What could you say is a rule when dividing any number by 1? multiplication. 4 ÷ 1 = ? 1 2 Click Every time I divide by 1, the answer is other number. Every time I divide by 1, the quotient is equal to the dividend. Click To find the answer to the division problem on a chart, start at the divisor on left column. Follow the row to the right to find dividend. Go up to find the quotient (answer).