72 × 10 − 72 × 9 = 72
25*4 - 19*4 = 24
80 × 5 − 75 × 0 = 400
(72х10)-(72х9)=72
(25-19)х4=24
80х5-75х0=400
72 × 10 − 72 × 9 = 72
25*4 - 19*4 = 24
80 × 5 − 75 × 0 = 400
(72х10)-(72х9)=72
(25-19)х4=24
80х5-75х0=400