Question 1: Fill in the seven numbers 1, 2, 3, 4, 6.7.8 in the box, and each number appears exactly once to form an integer formula. () × () = () = () divided by ()

Solution: ∫3×6 = 18 = 72/4.

∴(3)×(6)=( 18)=(72) divided by (4).

Question 2: Fill in the eight numbers 1, 2, 3, 4, 5, 6.7.8 in the box, and each number appears exactly once to form an integer formula. () × () = () = () divided by ()

Solution: ∫ 3× 4 = 6+8-2 = (5+7)/1=12.

∴(3)×(4)=(6+8-2)=(5+7) divided by (1).