400 - 20 * 2 =380 * 2=760
80 - 1 * 5 = 395
25 - 9 * 4=64
20 - 1 * 1= 19
<span>(164 + 1036) : 100 * (980 : 4 - 176)=828
1) 164+1036=1200
2) 980:4=245
3) 245-176=69
4) 1200:100=12</span>
<span>5) 12*69=828
Элементарно, Ватсон! </span>
<span> </span>
(3/8-1/9)+25/36=(27/72-8/72)+50/72=19/72+50/72=69/72=23/24
(7/8-13/20)+9/10=(35/40-26/40)+36/40=9/40+36/40=45/40=9/8=1 1/8
(3/4-8/15)+17/20=(45/60-32/60)+51/60=13/60+51/60=64/60=16/15=1 1/15
-15,76+34,22-24,72+4,43-81,16=-82,99