a)11 i 1/4 * ( 1 i 2/3-1 i 19/21*0,7)= 11 i 1/4*(1 i 14/21 - 1 i 19/21*0,7)= 11 i 1/4*(-5/11 * 7/10)= 11 i 1/4 * 7/22= 45/4 * 7/22= 315/88 = 3 i 51/88 b) 4 i 1/8 + (1,2-0,65):7 i 1/3= 4 i 1/8 + 0,55 : 7 i 1/3= 4 i 1/8 + 55/100 : 22/3= 4 i 1/8 + 55/100 * 3/22= 4 i 1/8 + 3/40 = 4 i 5/40 + 3/40= 4 i 8/40= 4 i 1/5
a) 11 i 1/4 * ( 1 i 2/3-1 i 19/21*0,7)= 45/4*(5/3-40/21*7/10)= 225/12-1800/84+315/40=<1800 skracasz z 40, przy 1800 piszesz 45, a przy 40 piszesz 1> 1575/84-45/84+315= 315 i 765/42 b) 4 i 1/8 + (1,2-0,65):7 i 1/3= 33/8+55/100:22/3=33/8+165/2200
a) 11 i 1/4 * ( 1 i 2/3-1 i 19/21*0,7)= 10,25*( 1 i 2/3 - 1 i 19/21 * 7/10) = 10,25* ( 1i 2/3 - 280/210) = 10,25* ( 1 i 2/3 - 1 i 1/3) = 45/4 * 1/3 = 15/4 = 3 i 3/4 b)4 i 1/8 + (1,2-0,65):7 i 1/3= 4 i 1/8 + 0,55: 7 i 1/3= 4 i 1/8 + 55/100 : 22/3= 4 i 1/8 + 55/100* 3/22= 4 i 1/8 + 3/40= 124/40 + 3/40= 128/40= 3 i 1/5