To solve complex multiplication problems involving scaling by

To solve complex multiplication problems involving scaling by fractions and simple rates. Year 5 - Number (GDS) Lesson 3

LI: To solve complex multiplication problems involving scaling by fractions and simple rates. I can note down all the key information in the question. I can use ratio to help my organise my values. I can use a multiplier to help me find my final answer. Vocabulary Multiply Groups of Lots of Each Times tables Column method Regroup Placeholder Scaling Multiplier Ratio Recap from the last lesson… Look at the skills and then quickly check your understanding. Previously, we looked at how we can solve multiplication problems using column method. Learning check: You do…. Let’s quickly recap the rules of using column method for multiplication. . . 1. The digits of the multiplicand the multiplier need to be placed correctly according to their place value. 2. Using the ones digit of the multiplier, multiply the each digit of the multiplicand write your answers down accordingly. 3. If you have a two digit multiplier, you need to add a placeholder before multiplying each digit of the multiplican by the tens digit of the multiplier. You will notice that multiplying by the tens digit will cause the digits of your answer to shift to the left because of the placeholder. 4. Finally add up the last two rows of your column method to get your final answer.

LI: To solve complex multiplication problems involving scaling by fractions and simple rates. I can note down all the key information in the question. I can use ratio to help my organise my values. I can use a multiplier to help me find my final answer. Vocabulary Multiply Groups of Lots of Each Times tables Column method Regroup Placeholder Scaling Multiplier Ratio Previous learning recap… Fluency - multiplying using column method. Learning check: You do…. Solve the following equations: 1. 2. 3. 4. 2320 X 23 = 4093 X 39 = 38. 29 X 43 = 783. 2 X 55 = Answers: 1. 2. 3. 4. 53360 159627 1646. 47 43076 If you are struggling with these equations, don’t be afraid to watch this video.

LI: To solve complex multiplication problems involving scaling by fractions and simple rates. I can note down all the key information in the question. I can use ratio to help my organise my values. I can use a multiplier to help me find my final answer. Vocabulary Multiply Groups of Lots of Each Times tables Column method Regroup Placeholder Scaling Multiplier Ratio Application questions: 1) Richard has a recipe to make a cake for 3 people. He will need 584 g of flour and 113 g of sugar. How much of each ingredient will he need for 12 people? 2) Jessica had made a model of an aeroplane. The model is 156 cm long. The real aeroplane is 9 ½ times bigger. What is the size of the real aeroplane? Teacher Example… Application questions Watch the video to see how we can solve these problems.

LI: To solve complex multiplication problems involving scaling by fractions and simple rates. I can note down all the key information in the question. I can use ratio to help my organise my values. I can use a multiplier to help me find my final answer. Vocabulary Multiply Groups of Lots of Each Times tables Column method Regroup Placeholder Scaling Multiplier Ratio Teacher Example… Reasoning questions. . . Reasoning question: A small cup can hold 330 ml of liquid. An extra large cup can hold 4 times more. Lucy says that the extra large cup can hold exactly 1 L of liquid. Is she correct? Explain your answer. Watch the video to see how we can solve these problems.

LI: To solve complex multiplication problems involving scaling by fractions and simple rates. I can note down all the key information in the question. I can use ratio to help my organise my values. I can use a multiplier to help me find my final answer. Vocabulary Multiply Groups of Lots of Each Times tables Column method Regroup Placeholder Scaling Multiplier Ratio Learning check: You do…. Q 1 A scaled down version of a building is 1312 cm long. The actual version of the building 38 times larger. What is the size of the actual building? Q 2 Dave needs 25 pieces of bread and 14 pieces of cheese to make sandwiches for 10 people. He argues that he would double the amount of each ingredient if he was to make sandwiches for 3 people. Is he correct? Explain your answer.

LI: To solve complex multiplication problems involving scaling by fractions and simple rates. I can note down all the key information in the question. I can use ratio to help my organise my values. I can use a multiplier to help me find my final answer. Vocabulary Multiply Groups of Lots of Each Times tables Column method Regroup Placeholder Scaling Multiplier Ratio Learning check: Answers: Q 1 A scaled down version of a building is 1312 cm long. The actual version of the building 38 times larger. What is the size of the actual building? 1312 X 38 = 49856 cm Q 2 Dave needs 25 pieces of bread and 14 pieces of cheese to make sandwiches for 10 people. He argues that he would double the amount of each ingredient if he was to make sandwiches for 3 people. Is he correct? Explain your answer. No, he is incorrect because 10 X 3 = 30 therefore he will need three times the amount of each ingredient.

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 n-y. Bt 6 cgz. E 8 rx. Sk 4 qvop. D 8 UHM 18 yts. VRA 73 v. Kb. CXe. Hg/edit Remember to log onto maths whizz as well this week!