20:6=3(ост.2)
31:5=6(ост.1)
44:7=6(ост.2)
65:9=7(ост.1)
18:4=4(ост.2)
27:5=5(ост.2)
0,64:(-0,16)= -4 ; 7/12:(-1/4) = -2,(3); (-8/15):(-1 1/5) = 0,(4)
<span>42-(19+12) = 11
(28+37)+12 = 77
6*9+(27+26) = 54 + 53 = 107
8*7-(4*4+14)</span> = 56 - 30 = 26
Х+1,6=5,6:0,08
х+1,6=70
х=68,4