BEATCALC:  Beat the Calculator!

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Back to Calculation Tips & Tricks
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Calculation Practice from the BEATCALC

Here are some of the calculations that you can do mentally after practicing the BEATCALC exercises. See how many you can do. Check your answers with a calculator. Your mental math powers should be impressive!

   15 × 15      89 × 89     394 × 101     32 × 38      51 × 59
  101 × 147    101 × 94      93 × 93     228 × 101     25 × 25
   56 × 56      94 × 96     101 × 448     83 × 87     687 × 101
   64 × 66      52 × 52     101 × 654     35 × 35      11 × 19
  101 × 206     61 × 69      89 × 101     61 × 61      34 × 36
  101 × 48      52 × 52      45 × 45     456 × 101     54 × 54
   41 × 41     101 × 41      32 × 32      83 × 101     29 × 29
   55 × 55      63 × 67     479 × 101     82 × 82     882 × 101
   14 × 16     319 × 101     73 × 77      65 × 65     101 × 859
   13 × 17     101 × 149     41 × 49      82 × 101     75 × 75
  101 × 144     71 × 79      69 × 101     22 × 22     993 × 101
   51 × 51      85 × 85     101 × 101    129 × 101     69 × 69
   31 × 39     738 × 101     21 × 29      71 × 71      77 × 101
   95 × 95     265 × 101     74 × 76      53 × 53     101 × 409
   51 × 51      98 × 101     94 × 94      42 × 42      53 × 57
  339 × 101     62 × 68     101 × 88      19 × 19     238 × 101
   43 × 47      96 × 96      21 × 21     101 × 279     81 × 89
  648 × 101     62 × 62     101 × 57      24 × 26     101 × 668
   99 × 99      23 × 27      22 × 28     515 × 101     97 × 97
   79 × 79     101 × 826    245 × 101     31 × 31      37 × 33
  101 × 218     82 × 88      39 × 39     126 × 101     91 × 99
   68 × 101     51 × 101    598 × 101     98 × 98      72 × 72
   91 × 91      54 × 56     101 × 29      57 × 57     771 × 101
   81 × 81     559 × 101     52 × 58      59 × 59      84 × 86
   46 × 44     101 × 25      12 × 18     101 × 697     92 × 92
  349 × 101     93 × 97     101 × 188     42 × 48      49 × 49
  101 × 388     58 × 58      92 × 92     101 × 78      37 × 101

How many could you do quickly and accurately?

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14 January 1996
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