Is it reasonable?
367 + 258 = 625 Grade 3
How this one works
How
compare your estimate to your exact answer; are they close?
Best when
you have finished and want to know if you can trust it.
The same problem, other ways
Try “number line” or “4.5D”
367 + 258 = 625 Grade 3
How this one works
compare your estimate to your exact answer; are they close?
you have finished and want to know if you can trust it.
The same problem, other ways