Rounding Starter 12012022 Count forward and backwards in

Rounding Starter: 12/01/2022 Count forward and backwards in 10 and 5 10, 30, ? 12, 17, ? 21, 26, ? 112, 117, ? 100, ? , 120, 50, ? , 60, 38, ? , 28 31, ? , 41 238, ? , 328 140, ? , 160 15, ? , 35, 10, ? , 20 19, 24, ? 110, ? 120 ? , 115 , 125 45, ? , 25 27, 32, ? 16, 21, ? 29, ? , 19 145, ? , 125 15, 25, ? , 15 10, 5, ? 21, ? , 11 115, 125, ? , 12, 22, ? 37, 32, ? ? , 5, 10 26, ? , 36 212, 222, ? 38, ? , 18, 67, 62, ? 17, 22, 91, ? , 111 338, ? , 318, 10, ? , 30, 5, 10, ? 32, 27, ? 101, ? , 81 210, ? , 230, 27, 37, ? 62, ? 52 23, ? , 33 41, ? , 61 527, 537, ? 67, ? 87 62, 52, ? 23, 33, ? 31, ? , 11 221, 216, ?

Rounding LO: 12/01/2022 I can : estimate answers by rounding numbers. Is to: Count forward and back in 10 s 100 s and 1000’s Keywords Developing estimate round approximate Is to: Round numbers below 100 to the nearest 10. Emerging Round numbers to the nearest 10, 100 and 1000. Secure

Rounding 12/01/2022 Rounding helps us count easily in tens and hundreds. If has you have £ 7 you might say “I have almost £ 10”, because £ 7 is close to £ 10 1 2 3 4 5 6 7 8 9 10 £ £ £ £

Rounding 12/01/2022 Counting in tens is easy. Try this number line: 10 20 30 40 50 60 70 80 90 100 110 Complete these number sentences: 20 + 80 = 100 20 – 10 = 10 80 + 30 = 110 90 – 40 = 50 30 + 50 = 80 110 – 20 = 90

Rounding 12/01/2022 How do we know what to round to? 0 1 2 3 4 5 6 7 8 9 10 These numbers round up These numbers round down What would we round 7 to? 0 1 2 3 4 5 6 7 8 9 10

Rounding What would we round 37 to? 30 31 32 33 34 35 36 37 38 39 40 What would we round 73 to? 70 71 72 73 74 75 76 77 78 79 80 What would we round 55 to? 50 51 52 53 54 55 56 57 58 59 60 12/01/2022

Rounding 12/01/2022 What are the smallest and largest numbers that you could round to 40? 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 There is always a difference of 9 between the smallest and the largest. Smallest possible Rounded number Largest possible 75 84 80 45 54 50 15 24 20 85 94 90

Rounding 12/01/2022 Round these numbers to the nearest ten. 68 70 13 10 44 40 25 30 79 80 87 90 92 90 55 60

Rounding 12/01/2022 Round these numbers to the nearest 10. Number Lowest 10 Highest 10 Round to nearest the 10 89 80 90 90 45 72 12 9 4712 5629 4755 9999

Rounding 12/01/2022 Round these numbers to the nearest 100. Number Lowest 100 Highest 100 Round to the nearest 100 376 300 400 1417 101 149 251 1891 24699 1999 237011

Rounding 12/01/2022 Round these numbers to the nearest 1000. Number Lowest 1000 Highest 1000 Round to the nearest 1000 1001 1000 2000 2500 3999 132400 56471 55551 23986 1002568 563282

Rounding Choose your own numbers. Number 12/01/2022

Rounding 12/01/2022 Complete the codebreaker. Question 387 is between 300 and _______. 1489 is between ____ and 1500. 980 is between 900 and _______. 32 is between 30 and _____. 863 is between 800 and ____. Round 7 to the nearest 10 Round 1420 to the nearest 100 Round 3, 522 to the nearest 1000 Round 35 to the nearest 10 Round 1318 to the nearest 10 Round 995 to the nearest 10 Round 12. 6 to the nearest 10 Round 430 to the nearest 1000 Round 52 to the nearest 100 Round 554 to the nearest 10 Round 5, 555 to the nearest 1000 Round 397 to the nearest 10 Round 994 to the nearest 10 Round 1970 to the nearest 100 Round 54. 69 to the nearest whole number Round 1429 to the nearest 1000 Round 45 to the nearest 100 Round 986 to the nearest 10 Round 452. 9 to the nearest 10 Round 1363 to the nearest 100 Answer Letter