Odpowiedź :
a) (1,85 + 0,35) x 7,7/ 3-2,986 = 2,2*7,7/0,014=2,2*550=1210
b) ( 4 5/12 - 4/ 2 2/3 ) x 1,8 = (53/12-4:8/3)*1,8 = (53/12-3/2)*1,8 = (53/12-18/12)*1,8 = 35/12*1,8 = 5,25
c) 2 1/8 - 1 2/3 / 1 3/8 : 1 1/3 = 17/8 – 5/3 : 11/8 : 4/3 = 51/24-40/3 : 11/8 : 4/3 = 11/3 *8/11 *3/4 = 2
d) 1 9/16 x 3,2 +48/ 3/5 : 7/8 = 25/16 * 3,2 +48 : 3/5 : 7/8 = 5 * 5/3 * 8/7 = 200/21 = 9 11/21
e) 1,75 x 3 1/21 + 1/6 / 0,36 + 2/3 = 1,75 * 64/21 +1/6 * 100/36 + 2/3 = 16/3+100/216+2/3 = 1152/216+100/216+144/216=1396/216=6 100/216= 6 25/54
f) 2,4 x (5/6)*2 - 1/6 / 1/3 + 1,5 = 4,8*5/6-1/6:1/3+1,5 = 4-0,5+1,5 = 5
g) 1,4 + 1 2/3 : 8 1/3 / 1 2/9 - 1 1/18 = (14/10+5/3*3/25) / (10/9-19/18) = 14/10+9/11-19/18 = (14/10+1/5)/(20/18-19/18)=(16/10)/(1/18)=1,6*18=28,8
h) (2,25 - 1 5/6) x 2,4 / 1 1/9 x (5,15 - 4,25) = (9/4-11/6)*2,4:10/9 * 0,9 = [(18/12-22/12)*2,4]/1 = -4/12*2,4= -1/3*12/5=4/5
i) 1,2 : 0,375 / 6,64 - 21/40 : 2 3/16 = 3,2/(6,64-21/40:35/16) = 3,2/(6,64-0,6)=3,2:6,04=32/100*100/604=8/151
b) ( 4 5/12 - 4/ 2 2/3 ) x 1,8 = (53/12-4:8/3)*1,8 = (53/12-3/2)*1,8 = (53/12-18/12)*1,8 = 35/12*1,8 = 5,25
c) 2 1/8 - 1 2/3 / 1 3/8 : 1 1/3 = 17/8 – 5/3 : 11/8 : 4/3 = 51/24-40/3 : 11/8 : 4/3 = 11/3 *8/11 *3/4 = 2
d) 1 9/16 x 3,2 +48/ 3/5 : 7/8 = 25/16 * 3,2 +48 : 3/5 : 7/8 = 5 * 5/3 * 8/7 = 200/21 = 9 11/21
e) 1,75 x 3 1/21 + 1/6 / 0,36 + 2/3 = 1,75 * 64/21 +1/6 * 100/36 + 2/3 = 16/3+100/216+2/3 = 1152/216+100/216+144/216=1396/216=6 100/216= 6 25/54
f) 2,4 x (5/6)*2 - 1/6 / 1/3 + 1,5 = 4,8*5/6-1/6:1/3+1,5 = 4-0,5+1,5 = 5
g) 1,4 + 1 2/3 : 8 1/3 / 1 2/9 - 1 1/18 = (14/10+5/3*3/25) / (10/9-19/18) = 14/10+9/11-19/18 = (14/10+1/5)/(20/18-19/18)=(16/10)/(1/18)=1,6*18=28,8
h) (2,25 - 1 5/6) x 2,4 / 1 1/9 x (5,15 - 4,25) = (9/4-11/6)*2,4:10/9 * 0,9 = [(18/12-22/12)*2,4]/1 = -4/12*2,4= -1/3*12/5=4/5
i) 1,2 : 0,375 / 6,64 - 21/40 : 2 3/16 = 3,2/(6,64-21/40:35/16) = 3,2/(6,64-0,6)=3,2:6,04=32/100*100/604=8/151