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Mental math grade 1

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  • 78 + 18
    96
  • 92 + 5
    97
  • 82 - 71
    11
  • 40 - 20
    20
  • 364- 45
    319 three hundred nineteen
  • 17 + 34
    51
  • 52 + 27
    79
  • 90 + 26
    116
  • 611- 307
    304 three hundred four
  • 82- 69
    13 thirteen
  • 91 - 41
    50
  • 71 + 9
    80
  • 52 + 52
    104
  • 46 + 31
    77
  • 33 + 49
    82
  • 50- 23
    27 twenty- seven
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