Решить 2 примера в дробях [13/18-3/8]-[5/8-1/3] [19/24-4/15]-[7/6-6/15] - вопрос №213183858131924415766153401420 от karapyz32 10.02.2020 19:40

Question

Математика: Решить 2 примера в дробях [13/18-3/8]-[5/8-1/3] [19/24-4/15]-[7/6-6/15]

karapyz32 · Answer

1) (13/18-3/8)-(5/8-1/3)=(4*13-3*9/72)-(3*5-1*8/24)=52-27/72- 15-8/24=25/72-7/24=
25-21/72=4/72=1/18

2) (19/24-4/15)-(7/6-6/15)= 19*5-4*8/120 - 7*5-6*2/30=95-32/120-35-12/30=
63/120-23/30 = 63-23*4/120=63-92/120=-29/120