1) 120/100*40=48
2) <span>17.39:(15-14.26)-6:12.5=17.39:0.74-6:12.5=23.5-6:12.5=23.5-0.48=23.02</span>
<span>1. 15-14.26=0.74</span>
<span>2. 17.39:0.74=23.5</span>
<span>3. 6:12.5=0.48</span>
<span>4. 23.5-0.48=23.02
</span>
А) (4,67+5,33)+(3,15+6,85)=10+10=20
б) (13 7/15+14 8/15)+(11 8/13-3 5/13)=28+5 3/13=33 3/13
2) а) (851-651)+348=200+348=548
б)(2,67-5,67)+3,88=-3+3,88=0,88
4) а)(3/10*10/3)*(15/7*7/15)=1*1=1
б)(-3/11*(-11/3))*(-5/7*(-49))=1*35=35