12. At a local grocery store 12 out of 30 customers bought pastries from the bakery. If the store had a total of
830 customers, how many customers would have bought pastries from the bakery?

38+105= 143, 39+104=143, and you will find then adding the numbers on opposite sides, moving inwards yields the answer 138 every time. because of this, you’re going to multiply 138 times the number of pairs, which is 34. therefore, 34*138= 4692(i’m sorry if it’s the wrong numbers, but it’s the right concept)

24 students walk to school