math
posted by shreya .
would you use mental math to solve 2984+1997+406? explain

Sure.
Just think of numbers (round up or down) that are closest to each of these and then add.
3000 + 2000 + _____ = ______
posted by shreya .
would you use mental math to solve 2984+1997+406? explain
Sure.
Just think of numbers (round up or down) that are closest to each of these and then add.
3000 + 2000 + _____ = ______