Let's analyze Kay's addition of 253 + 14, which should equal 267.
-
Did not line up the digits with the same place value: This could lead to an incorrect sum if she didn't align the numbers correctly. It's possible this was a mistake.
-
Incorrectly added together 3 ones and 4 ones: 3 ones + 4 ones should equal 7 ones, not cause an error in the sum she got (which is incorrect).
-
Incorrectly added together 5 tens and 1 ten: 5 tens + 1 ten should equal 6 tens. This doesn't cause an issue in her sum either, as it matches the correct addition.
-
Added 1 hundred to 253 instead of 1 ten: If she thought she was adding a hundred when she was supposed to be adding a ten, that could lead to a large discrepancy in her final sum.
-
Added 4 tens to 253 instead of 4 ones: Adding 4 tens instead of 4 ones would also result in a considerable error in the final sum, as 4 tens added would give her 40 instead of just 4.
Based on these evaluations, Kay's mistakes would likely include:
- Kay did not line up the digits with the same place value.
- Kay added 1 hundred to 253 instead of 1 ten.
- Kay added 4 tens to 253 instead of 4 ones.
So, the correct answers to what Kay did wrong are the first, fourth, and fifth options.
0 answers