Mathias and his brother divided 2,017 marbles equally. Use compatible numbers to estimate how many marbles each brother received. They each received about marbles.

compatible numbers are numbers that we can use to solve complex calculations in a simpler manner.

instead of dividing 2,017 by 2, we can decompose this division in the following way:

even if you do not like math, you are probably able to divide 2,000 by 2 = 1,000

we still have 17 marbles left, and since you should know that 2 x 8 = 16

we calculated that each brother received 1,000 + 8 = 1,008 marbles and they had 1 left over.

all it means is function 3