1/2*log7 36 - log7 14 = log7 6 - log7 14 = log7 6/14
<span>1) (2-17)*(26-16) = (-15) * 10 = -150
2) (-45+15)*(-10-5) = (-30) * (-15) = 450
3) -0,25*2/3*(-40)*(-4,5) = (-25/100) * 2/3 * (-40) * (-45/10) = (-1/4) * 2/3 * (-40) * (-9/2) = (-1/6) * 180 = -30</span>
94-56=38
81-24=57
28-19=9
45-18=27
По действиям
7,15+14/2,8*0,17=7,15+5*0,17=7,15+0,85=8
4*0,375+2,5=1,5+2,5=4
8/4=2
2,4*5/8=0,3*5=1,5
1,5*(2/3-2)=1,5*2/3-1,5*2=0,5*2-3=1-3=-2
6,84/1,9=3,6
-2+3,6=1,6
<span>3 1/8*1,6=25/8*1,6=25/1*0,2=25*0,2=5</span>