b) $0,028 \cdot 5+\sqrt{0,0016}-(-0,5)^{2}+2,4: 0,6=$
\(\boxed{-3.57}\)
Step 1 :\(0.028 \cdot 5 = 0.14\)
Step 2 :\(\sqrt{0.0016} = 0.04\)
Step 3 :\((-0.5)^{2} = 0.25\)
Step 4 :\(2.4 \div 0.6 = 4\)
Step 5 :\(0.14 + 0.04 + 0.25 - 4 = -3.57\)
Step 6 :\(\boxed{-3.57}\)