47,23+32,669,46-0,452)47,23+(32,77-16,11)3)(46,83+15,17)-(16,83-4,02)
aptem228
47.23+32.66=79.89
9.46-0.45=9.01
47.23+(32.77-16.11)=47.23+16.66=63.89
(46.83+15.17)-(16.83-4.02)=62.00-12.81=49.19
Х+3=0,5х-2; х-0,5х=-3-2; 0,5х=-5; х=-5:0,5; х=-10.
у=0,5×(-10)-2; у=-7. Ответ: х=-10, у=-7
С=DП=10см*3.14=31.4см
C=DП=2.5м*3.14=7.85м
1)44:2=22, 22:2=11, 11:11=1; 2)124:2=62, 62:2=31, 31:31=1; 3)321:3=107, 107:107=1