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Ms. Damji Madness

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  • Estimate: 764 + 231
    800 + 200 = 1,000. Real answer 995.
  • Add: 746 + 289
    1,035
  • Estimate: 982 - 456
    1,000 - 500 = 500 (Real answer 526)
  • True or false: A hundred is bigger than a hundredth!
    True!
  • 2390 + 2910 = ? Use the round up/round down and adjust strategy
    2400 + 2900 (Real Answer: 5300)
  • True or False: Five Tenths is bigger than Twenty Five Hundredths!
    TRUE: Five Tenths (0.5 is bigger than 0.25)
  • True or False: In a place value chart, there is a decimal.
    True!
  • Add: 824 + 539
    1,363
  • Round 296 to the nearest ten.
    300
  • Estimate: 423 + 189
    400 + 200 = 600 (Real Answer 612)
  • 180 + 190 = ? Use the round up/round down and adjust strategy
    Estimate: 400, Real Answer: 370
  • True or False: A tenth is bigger than a ten.
    FALSE! Tenth is smaller
  • 290 + 390 (Write the expanded form mental math strategy)
    200+90+300+90 (Estimate: 700) - Real Answer 680
  • 39 + 99 = ? Use the round up/round down and adjust strategy
    Estimate: 140, Real Answer: 138
  • True or False: In a place value chart, the numbers to the LEFT of a decimal get BIGGER
    True! As you move to the left, the numbers get bigger and bigger!
  • Name a number that is bigger than one tenth.
    Anything bigger than 0.10
  • Round 863 to the nearest hundred.
    900
  • Estimate: 564 + 239
    600 + 200 = 800 (Real Answer: 803)
  • True or False: In a place value chart, the numbers to the right of the decimal get smaller.
    TRUE! As you move to the right the numbers get smaller and smaller.
  • 2300 + 4930 (Write the expanded form mental math strategy)
    2000 + 4000 + 300 + 900 + 30
  • True or false: A thousandths is bigger than a thousand.
    False!
  • Name a number that is smaller than one.
    Anything with a decimal!
  • Name a number that is bigger than one hundredths.
    Anything bigger than 0.01
  • Round 456 to the nearest ten.
    460
  • Add: 657 + 452
    1,109
  • True or False: 0.1 is bigger than 0.09999
    True! One tenth is bigger!
  • Estimate 659 - 453 to the nearest ten.
    660 - 460 = 200
  • Estimate: 478 - 251
    500 - 300 = 200 (Real answer 227)
  • Estimate: 874 - 453
    900 - 500 = 400 (Real Answer 421)
  • True or False: Six tenths is smaller than Ninety Nine Hundredths
    TRUE! Six Tenths (0.6 is SMALLER than 0.99).
  • 180 + 190 = ? Use the round up/round down and adjust strategy
    Estimate: 400, Real Answer: 370
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