Texas Math Models

Try “number line” or “4.5D”

Same difference (compensation)

625 − 258 = 367 G3–G4

add 2 to both 625 +2 627 − 258 +2 260 627 − 260 = 367 shift both the same: the difference doesn’t change

How this one works

How

add the same amount to both numbers to make an easier problem.

Best when

the number you take away is close to a ten or hundred.

seen one of these on a test? See it on a real question: TEKS 3.4A, adding and subtracting to 1,000.

The same problem, other ways