(2) ben 10_rounding[1]

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(2) ben 10_rounding[1]

  1. 1. There’s something you didn’t know about Ben Ten…
  2. 2. It’s something that he really can’t stand…
  3. 3. He can’t stand the units in numbers…
  4. 4. I like to see the BIG picture. When I look at data I need information, and I need it fast. I need to estimate about how many monsters there are.
  5. 5. To do this I need to round numbers up or down to the nearest 10 … or sometimes even to the nearest 100. (I’m not called Ben 10 for no reason, you know!)
  6. 6. 26 evil baddies bah!!!! I want to know which tens number 26 is nearest to. 20 30 26
  7. 7. Can you think of some rules for rounding up and down? Which numbers round down? Which numbers round up? What about numbers ending in 5? 0 10 1 2 3 4 5 6 7 8 9
  8. 8. Round some numbers to the nearest 10.
  9. 9. 130 evil baddies! How will I cope! Now I want to round numbers to the nearest hundreds number. 100 200 130
  10. 10. How could you change the rules that you made for rounding to the nearest hundred? Which tens numbers round down? Which tens numbers round up? What about 50? 0 100 10 20 30 40 50 60 70 80 90
  11. 11. Round some some numbers to the nearest 100.
  12. 12. In your numeracy books, complete these rounding questions. Set it out like the example on the right. <ul><li>23  20 </li></ul><ul><li>57  60 </li></ul>If you need to help yourself, use a number line or a number square. Round to the nearest 100 . Round to the nearest 10 . <ul><li>395 </li></ul><ul><li>226 </li></ul><ul><li>383 </li></ul><ul><li>349 </li></ul><ul><li>460 </li></ul><ul><li>408 </li></ul><ul><li>297 </li></ul><ul><li>95 </li></ul><ul><li>406 </li></ul><ul><li>377 </li></ul><ul><li>151 </li></ul><ul><li>169 </li></ul><ul><li>232 </li></ul><ul><li>262 </li></ul><ul><li>308 </li></ul><ul><li>143 </li></ul><ul><li>318 </li></ul><ul><li>475 </li></ul><ul><li>464 </li></ul><ul><li>337 </li></ul><ul><li>84 </li></ul><ul><li>35 </li></ul><ul><li>5 </li></ul><ul><li>78 </li></ul><ul><li>72 </li></ul><ul><li>79 </li></ul><ul><li>44 </li></ul><ul><li>14 </li></ul><ul><li>33 </li></ul><ul><li>31 </li></ul><ul><li>48 </li></ul><ul><li>99 </li></ul><ul><li>49 </li></ul><ul><li>9 </li></ul><ul><li>52 </li></ul><ul><li>97 </li></ul><ul><li>44 </li></ul><ul><li>85 </li></ul><ul><li>42 </li></ul><ul><li>73 </li></ul>

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