In this case 2 tens are subtracted from 8 tens to leave 6 tens. This is similar to 2 oranges being subtracted from 8 oranges to leave 6 oranges. Each digit of a number in our number system has a different place value. When subtracting numbers, always subtract in the same place value column such as the ones, tens or hundreds place values. You have correct and incorrect.
Extra time is awarded for each correct answer.
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