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level: Arithmetic Errors

Questions and Answers List

Question	Answer
What mistake was made with the following equation? 5 × 4 = 25	Miscounted number of groups
What mistake was made with the following equation? 10 + 7 = 3	Subtracted by mistake
What mistake was made with the following equation? 9 + 5 = 13	Started counting at 9
What mistake was made with the following equation? 1/2 of 46 is 92	Mixed up half and double
What mistake was made with the following equation? 2/3 ÷ 1/4 = 2/12	Mixed up multiplying and dividing fractions
What mistake was made with the following equation? 4 - (-7) = -3	Did not subtract a negative number properly
What mistake was made with the following equation? 2.6 + 4.07=6.13	Did not use the places properly
What mistake was made with the following equation? 13 - 45 = 32	Did not know how to represent a negative difference
What mistake was made with the following equation? -8 * (-9) = -72	Misunderstood the multiplication pattern
What mistake was made with the following equation? -8 + 15 = -23	Did not know the effect of adding a positive integer