Пошаговое объяснение:
1) 12 6/7*2/25 *7/18 = 90/7 * 2/25 * 7/18 = (90/7 * 7/18) * 2/25= 5 * 2/25=
= 10/25= 2/5
2) 15/16 * 1 13/27 *2 4/25 = 15/16 * 40/27 *54/25 = 15/16*( 40/27 * 54/25)=
= 15/16 * 16/5 = 15/5 = 3
3) 3 9/10 * 8/13 *4 1/6 = 39/10 * 8/13 * 25/6= (39/10* 8/13)* 25/6= 12/5 * 25/6=
= 300/30= 10
4) 8 1/3 * 2 1/5* 1 1/11= 25/3 *11/5 *12/11= 25/3*( 11/5 * 12/11)= 25/3 * 12/5= =300/15 = 20
Пошаговое объяснение:
1) 12 6/7*2/25 *7/18 = 90/7 * 2/25 * 7/18 = (90/7 * 7/18) * 2/25= 5 * 2/25=
= 10/25= 2/5
2) 15/16 * 1 13/27 *2 4/25 = 15/16 * 40/27 *54/25 = 15/16*( 40/27 * 54/25)=
= 15/16 * 16/5 = 15/5 = 3
3) 3 9/10 * 8/13 *4 1/6 = 39/10 * 8/13 * 25/6= (39/10* 8/13)* 25/6= 12/5 * 25/6=
= 300/30= 10
4) 8 1/3 * 2 1/5* 1 1/11= 25/3 *11/5 *12/11= 25/3*( 11/5 * 12/11)= 25/3 * 12/5= =300/15 = 20