Mathias and his brother divided 2,030 marbles equally use compatible numbers to estimate how many marbles each brother received

each brother received 1,015 marbles cus 2,030 divided by 2 is 1,015.

6 ounce of cereal are left in  the box

Step-by-step explanation:

Total amount of cereal = 16 ounce

Amount of cereal eaten by Tina= 3/8 X16= 6ounce

Amount of cereal eaten by Lane= 1/4 X16= 4ounce

Amount of cereal left = Total amount of cereal -Amount of cereal eaten by Tina and Lane

=16- ( 6+4)

16-10

= 6 ounce of cereal remaining