Explicație pas cu pas:
calculați :
b) (0,6-12 1/5):9,(6) = ( 6/10 - 61/5) : 87/9 = (6/10 - 122/10) : 87/9 = - 116/10 × 9/87 = - 1044/ 870 = - 522/435= - 174/145 = - 6/5
efectuați :
b) (7/5+8/15×3/4):21/10 = (7/5 + 24/60) : 21/10 = (7/5 + 2/5) : 21/10 = 9/5 : 21/10 = 9/5 × 10/21 = 90/105 = 18/21 = 6/7
efectuați :
b) (2 1/9-25/36:5/4)×3/28 = (19/9 - 25/36 × 4/5) × 3/28 = (19/9 - 100/180) × 3/28 = (19/9 - 5/9)× 3/28 = 14/9 × 3/28 = 42/252 = 1/6
efectuați :
b) (9/2-1/3)×6/10 = (27/6 - 2/6) × 6/10 = 25/6 × 6/10 = 150/60= 5/2
