310320 WALT multiply 3 digit by 2 digit

31/03/20 WALT: multiply 3 digit by 2 digit numbers. WILF: • I can use grid method • I can use the knowledge of times tables • I can use the long strategy to solve problems • I can use multiplication facts to solve multi step problems. Key Vocabulary: partition, Multiply, add together, whole numbers, ones, tens, hundreds exchange , product, place value holder, product, calculate

Starter: Arithmetic 1. 2. 3. 4. 5. Write in words= 45362 Add 199 to 34675 = 45. 5 x 1000 = Write the factors of: 44 Write the difference between these numbers -14 and 11 6. Round this number to the nearest 10000=456392 7. Calculate 4827 + 7079

Recap: multiply whole numbers TTh Th H T 1 4 3 X 5 7 1 1 O 2 4 2 8 Click on the link below to see how to work out: 3 digit x 2 digit https: //www. youtube. com/watch? v=P 59 v. Hj. Jul. Io

Are you ready to multiply larger numbers? 48 cm Can you calculate how much area each set of 3 tables needs? How much area is needed if each chair adds an extra 40 cm to the width of each table? 96 cm We can use a formal written method to multiply 2 -digits by 2 -digits

Let’s revisit what we should know We can use a formal written method to multiply 2 digits by 2 -digits. First we do 4 x 53 First, multiply 4 × 3 = 12. Put the 2 in the units column and the 1 tens below the tens column. Next, multiply 4 × 5(0) = 20(0). Add the 1 tens from the previous step and put 1 in the tens column. Then, put the 2 in the hundreds column. Now we do 40 x 53 Now, add a zero to the ones column on the 2 nd row - this acts as a place holder because a tens number is being multiplied. Next, multiply 4(0) × 3 = 12(0) and put the 2 in the tens column and the 1 hundred below the hundreds column. Then, multiply 4(0) × 5(0) = 20(00). Don’t forget to add the 1 hundred and put 1 in the hundreds column and 2 in the thousands column.

T Model: Use the formal multiplication method to complete the calculation below. 1) 263 x 34= 8942 2) Annie earns £ 1, 325 per week. How much would he earn in 14 weeks? Annie earns £_____ in 14 weeks. x 1325 14 ( 1325 x 4) (1325 x 10) Add them together

Karl is painting his door red. One tin covers an area of 10, 000 cm². The door is 198 cm x 76 cm. He thinks he needs to buy 15 tins. Is he correct? Explain your answer. Karl is not correct because 198 x 76 = 15, 048 so Karl needs to buy 2 tins.

Independent Task • Task 1 Fluency • Task 2 Reasoning Problem solving

Plenary: Exit task – Dong Nao Jin What could the missing numbers be?