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REVIEW UNIT 3

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  • Nam has 245 marbles. Minh gives him 128 more. How many in total?
    373
  • Estimate: 429 − 98 is about...?
    430-100=330
  • 500 − 236 =?
    264
  • What is 247 rounded to the nearest ten?
    250
  • Which is the best estimate for 247 − 34?
    250 − 30 = 220
  • A farm has 403 chickens and 257 ducks. How many animals in total?
    660
  • Find one example: ‘The sum of three even numbers is even’
    Great
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