“Terah took his son Abram (…) and together they set out from Ur of the Chaldeans to go to Canaan.” (Genesis 11:31)
Abram lived some four thousand years ago and worked as a shepherd, but he was not an uneducated man. In Ur, the city where he grew up, boys went to school and learned to read, write and calculate — working out, for instance, how many gur of grain grew on 4,325 bur of land. (A bur is about 63 m² and yields 30 gur, the equivalent of 9,000 litres of barley.)
Do you find maths hard? Better get used to it. Children today do not have to work in gur and bur, but there is still plenty of multiplication, division, fractions and decimals to learn. And the same question comes up as with the Bible: why do I need this?
You need maths to know how much to save, to check your change in a shop, to measure boards when building. You need it for any number of everyday things. It is the same with the Bible: it can look theoretical and hard, but learning how God wants you to live and how to treat other people is thoroughly practical.
Ever since Abram was a boy in old Ur, children have learned both mathematics and the Scriptures. We cannot live without either.