One way is to round to the nearest ten first then subtract. 1 Another way is to round to the nearest hundred then subtract. 2 And one more way is to subtract then round to the nearest ten. 3 The last way is to subtract then round to the nearest hundred. 4
Example of #1 - 590-320 = 270 Example of #2 - 600-300 = 300 Example of #3 - 586-321 = 265 = 270 Example of #4 - 586-321 = 265 = 300
All of these should work it just depends on what your teacher wants. Choose any of the examples.
