2) <span>-2 3/4 +(+ 6,8) + (- 1,25) + (+ 3 1/5) = -2 3/4 + 6,8 - 1,25 + 3 1/5 = -2 3/4 + 6 8/10 - 1 1/4 + 3 1/5 = -11/4 + 68/10 - 5/4 + 16/5 = -55/20 + 136/20 - 25/20 + 64/20 = 120/20 = 6
3) </span><span>- 5 1/6 + (+ 7 1/9) + (-4 1/3) + (-7 1/9) = -5 1/6 + 7 1/9 - 4 1/3 - 7 1/9 = -31/6 + 64/9 - 13/3 - 64/9 = -31/6 - 13/3 = -31/6 - 26/6 = -57/6 = -9 3/6 = -9 1/2
</span>
1)27*10=270кг моркови
2)270-140=130кг свеклы
3)500-(270+130)=500-400=100кг лука
.N1 96×14=1344. 1344:8=168
N2. 60.5×3=181.5. 181.5:16.5=11
N3. 73×3=219. 219:7=31.285
7.9-5.5:х=7.35
7.9-5.5/х=7.35
7.9-55/10х=7.35
7.9-11/2х=7.35
-11/2х=7.35-7.9
-11/2х=-0.55
-11= -1.1х
х=10