write 1, 2, 3, 4, 5, 6, 7, 8 or 9 in each box.

write a number sentence that has the greatest sum
_,_ _ _ + _ _ _

write a number sentence that has the least sum
_,_ _ _ + _ _ _

4 answers

Greatest sum you want to use the highest numbers in the highest places..9876+543, do the opposite for the least.
thank you!
10,419
wouldn't it be 99999 and 11111?