Factors Multiples and Primes Lesson Objectives Developing students

Factors, Multiples and Primes Lesson Objectives: Developing students will be able to find factors and multiples of numbers. Secure students will be able to identify prime numbers. Excelling students will know prime numbers up to 100 and be able to solve problems involving them. 20 May 2021 Factors are numbers that divide exactly into another number. For example, factors of 12 are: = 1, 2, 3, 4, 6, 12 We already know 4 is a factor so we can stop here Keywords Factor, multiple, prime, product, multiply, divide When finding factors of a number, finding them in pairs will ensure you don’t miss out any

Factors, Multiples and Primes Factors Lesson Objectives: Developing students will be able to find factors and multiples of numbers. Secure students will be able to identify prime numbers. 20 May 2021 Find all the factors of the following numbers: a) b) c) d) e) 24 15 54 36 17 1, 2, 3, 4, 6, 8, 12, 24 1, 3, 5, 15 1, 2, 3, 6, 9, 18, 27, 54 1, 2, 3, 4, 6, 9, 12, 18, 36 1, 17 Excelling students will know prime numbers up to 100 and be able to solve problems involving them. Keywords Factor, multiple, prime, product, multiply, divide

Factors, Multiples and Primes 20 May 2021 Factors Find all the factors of the numbers 1 -20 1 1 2 1, 2 3 1, 3 4 1, 2, 4 5 1, 5 6 1, 2, 3, 6 7 1, 7 8 1, 2, 4, 8 9 1, 3, 9 10 1, 2, 5, 10 11 1, 11 12 1, 2, 3, 4, 6, 12 13 1, 13 14 1, 2, 7, 14 15 1, 3, 5, 15 16 1, 2, 4, 8, 16 17 1, 17 18 1, 2, 3, 6, 9, 18 19 1, 19 20 1, 2, 4, 5, 10, 20

Factors, Multiples and Primes 20 May 2021 Prime Numbers Prime numbers have ONLY TWO FACTORS. Which of the following are prime numbers? 1 1 2 1, 2 3 1, 3 4 1, 2, 4 5 1, 5 6 1, 2, 3, 6 7 1, 7 8 1, 2, 4, 8 9 1, 3, 9 10 1, 2, 5, 10 11 1, 11 12 1, 2, 3, 4, 6, 12 13 1, 13 14 1, 2, 7, 14 15 1, 3, 5, 15 16 1, 2, 4, 8, 16 17 1, 17 18 1, 2, 3, 6, 9, 18 19 1, 19 20 1, 2, 4, 5, 10, 20

Factors, Multiples and Primes 20 May 2021 Prime Numbers On your 1 -100 grid, colour in all the prime numbers by looking at the factors of each number. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 Start by colouring in the primes we’ve just found!

Factors, Multiples and Primes 20 May 2021 Prime Numbers On your 1 -100 grid, colour in all the prime numbers by looking at the factors of each number. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 Start by colouring in the primes we’ve just found! Then cross off anything in the 2 times table, 3 times table, etc.

Factors, Multiples and Primes 20 May 2021 Prime Numbers On your 1 -100 grid, colour in all the prime numbers by looking at the factors of each number. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 Start by colouring in the primes we’ve just found! Then cross off anything in the 2 times table, 3 times table, etc. The numbers left are prime!