4- (UEPG-PR) Assinale o que for correto \( \begin{array}{lll}\text { 01) }(-1)+(+5)=-4 & \text { 02) }(-5)-(+5)=10 & \text { 04) }(-3) \cdot(-4)=12 \\ \text { (4) }(+12):(-3)=4 & \text { 16) }(-2)^{2}=-4 & \text { 32) }(-2)^{3}=-8\end{array} \) (A resposta é dada pela soma das alternativas corretas)

a) \( 2600+13000= \) b) \( 230+14= \) c) \( 190+3600= \) d) \( 8000+300= \) e) \( 0.001+0.02= \) f) \( 30000+1000= \) g) \( 2800+120= \) h) \( 73000-2000= \) I) \( 0.0008-0.002= \) J) \( 0.06-0.003= \) J

c) \( \frac{4}{3}+\frac{1}{2}+\frac{1}{5}= \)

31. Solve the following problem: \( \left(2 \times 10^{9}\right) \times\left(5 \times 10^{5}\right) \)

32. Solve the following problem: \( \left(12 \times 10^{9}\right) \div\left(6 \times 10^{5}\right) \). Show your work

A earpenter had two big pieces of wood of equal length. The carpenter cut the first piece into smaller pieces of length 15 cm onch without remainder. The carpenter cut the second piece into smaller pieces of length 24 cm each without remainder. Determine the minimum length of each of the big pieces of wood.