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Mental Math

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  • 900 − 150 =
    750
  • Double of 125 =
    250
  • 800 − 345 =
    ***
  • 250 + 370 =
    620
  • 870 − 478 =
    392
  • 124 + 89 =
    213
  • 320 + 180 =
    500
  • 11 × 5 =
    55
  • Half of 86 =
    43
  • What number × 6 = 54?
    → 9
  • 6 × 7 =
    42
  • 300 more than 425 =
    725
  • 1000 − 456 =
    544
  • 9 × 6 =
    54
  • Triple of 45 =
    135
  • 560 − 275 =
    285
  • 7 × 8 =
    56
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