To solve multi step problems involving multiplying four

To solve multi step problems involving multiplying four digits by one and two digit numbers. Year 5 - Number (EXS) Lesson 2

LI: To solve multi step problems involving multiplying four digits by one and two digit numbers. I can use column method to solve multiplication problems. I can regroup if necessary. I can use a placeholder when multiplying by a two digit number. Recap from the last lesson… Look at the skills and then quickly check your understanding. Previously, we looked at how we can solve questions involving factors, multiples, square and cube numbers. Learning check: You do…. Vocabulary Let’s quickly recap the rules of find factors, multiples, square and cube numbers. . . Multiply Groups of Lots of Each Times tables Column method Regroup Placeholder 1. 2. 3. Factors are numbers that multiply together to make a number e. g: 4 and 2 are factors of 8 because they multiply them together to find 8. We can use factor spiders to find factors of a number. Multiples are the numbers that in times tables of a number. E. g: the multiples of 3 are 3, 6, 9, 12 and so on. Common multiples are those multiples that appear in one times tables and another. E. g: 12 is common multiple of the 3 and 4 times tables. Square numbers are the product of when you multiply a number by itself twice. E. g 52 = 5 X 5 = 25. Cube numbers are the product of when you multiply a number by itself three 3 QUESTIONS: 1. Find the common factors of 16 and 24 2. What are the first three common multiples of 4 and 8? 3. Solve: 52 + 33 =

Answers Factors QUESTIONS: 1. Find the common factors of 16 and 24 1, 2, 4, 8. 2. What are the first three common multiples of 4 and 8? 8, 16, 24. 3. Solve: 52 + 33 = 25 + 27 = 52 Multiples, square and cube numbers. Did you get these correct? If not, watch these videos from the last lesson of finding factors and multiples and calculating square and cube numbers. If you feel confident, carry on with the slides.

LI: To solve multi step problems involving multiplying four digits by one and two digit numbers. I can use column method to solve multiplication problems. I can regroup if necessary. I can use a placeholder when multiplying by a two digit number. Vocabulary Multiply Groups of Lots of Each Times tables Column method Regroup Placeholder Teacher Example… Fluency - Year 4 recap - multiplying using column method. Solve: No regrouping: 3221 X 3 = No regrouping: 2011 X 41 = Regrouping: 4931 X 21 = Watch the video to see a breakdown on how we use column method to multiply 4 digits by 1 and 2 digit numbers.

LI: To solve multi step problems involving multiplying four digits by one and two digit numbers. I can use column method to solve multiplication problems. I can regroup if necessary. I can use a placeholder when multiplying by a two digit number. Learning check: You do…. Solve the following equations: Vocabulary Multiply Groups of Lots of Each Times tables Column method Regroup Placeholder 1. 2. 3. 4. 3123 X 2 = 4914 X 6 = 2031 X 13 = 5632 X 41 = If you are struggling with these equations, don’t be afraid to go back and revisit the video. Answers: 1. 2. 3. 4. 6246 29484 26403 230912

LI: To solve multi step problems involving multiplying four digits by one and two digit numbers. I can use column method to solve multiplication problems. I can regroup if necessary. I can use a placeholder when multiplying by a two digit number. Vocabulary Multiply Groups of Lots of Each Times tables Column method Regroup Placeholder Application question: A school is looking to buy 9 new computers. Each computer costs £ 1209. The school will also £ 4505 loyalty discount. How much would the school have to pay? Reasoning question: Susan argues that 3132 X 3 will give a smaller answer than 3133 X 2 because 3132 is smaller than 3133. Do you agree? Explain your answer. Teacher Example… Application and reasoning questions. . . Watch the video to see how we can solve these problems.

LI: To solve multi step problems involving multiplying four digits by one and two digit numbers. I can use column method to solve multiplication problems. I can regroup if necessary. I can use a placeholder when multiplying by a two digit number. Q 1 Each classroom in a school has 450 red, 622 blue and 510 green colouring pencils. There are 25 classrooms in the entire school. How many coloured pencils are there altogether in the school? Q 2 James writes down the following number sentence: 7824 X 4 < 7842 X 4. Explain why he is correct. Vocabulary Multiply Groups of Lots of Each Times tables Column method Regroup Placeholder Learning check: You do….

LI: To solve multi step problems involving multiplying four digits by one and two digit numbers. I can use column method to solve multiplication problems. I can regroup if necessary. I can use a placeholder when multiplying by a two digit number. Q 1 Each classroom in a school has 450 red, 622 blue and 510 green colouring pencils. There are 25 classrooms in the entire school. How many coloured pencils are there altogether in the school? 45 + 62 + 50 =1582 X 25 = 39550 Q 2 James writes down the following number sentence: 7824 X 4 < 7842 X 4. Explain why he is correct. He is correct because 7824 X 4 = 31296 which is smaller than 7842 X 4 = 31368. Vocabulary Multiply Groups of Lots of Each Times tables Column method Regroup Placeholder Learning check: Answers:

Well done! Now complete the worksheet below on the google doc. You can either write the answers on the google doc, or write it out on paper and send a picture of your work to your teacher. https: //docs. google. com/document/d/1 Ot. C 1 Cdt 6 J 75 m. I 8 le 84 p. R 7 BC_Om. Jydqfs 3 Fh. Ym 87 gz. Ec/edit Remember to log onto maths whizz as well this week!