39 RESOLVA as seguintes expressões numéricas: A (24+14):(25-6)+(6+4)cdot 3 B. 5.(63:9+8)+20.5-(20.3-12:6) C 160+ 3cdot [15:3+(6.9-7.6)+(17.3-45:15)] D. 120-5.7: 3+16:8+[7.3+(5.2-1)] E [(246:6)+1]:7+1 cdot 7+1 F. [(181-1):4+5-1]:(2cdot 3+1) cdot 6+3 G [999:3-(28:7-1)]:55+4 cdot 10 H (96:48)cdot (75:15-2)cdot (160:4-36)cdot (2+78:26) I. [(2cdot 3:6+7):4+(70:5-6)]:5+7 241

Vamos resolver cada expressão numérica:

A. $(24+14):(25-6)+(6+4)\cdot 3$
$$(24+14):(25-6)+(6+4)\cdot 3 = 38:19+10\cdot 3 = 2+30 = 32$$

B. $5.(63:9+8)+20.5-(20.3-12:6)$
$$5.(63:9+8)+20.5-(20.3-12:6) = 5.(7+8)+20.5-(20.3-2) = 5\cdot 15+20.5-18.3 = 75+20.5-18.3 = 77.2$$

C. $160+\{ 3\cdot [15:3+(6.9-7.6)+(17.3-45:15)]\}$
$$160+\{ 3\cdot [15:3+(6.9-7.6)+(17.3-45:15)]\} = 160+\{ 3\cdot [5+(6.9-7.6)+(17.3-3)]\} = 160+\{ 3\cdot [5-0.7+14.3]\} = 160+\{ 3\cdot 18.6\} = 160+55.8 = 215.8$$

D. $120-5.7:\{ 3+16:8+[7.3+(5.2-1)]\}$
\[
120-5.7:\{ 3+16:8+[7.3+(5.2-1)]\} = 120-5.7:\{ 3+16:8+[7.3+4.2]\} = 120-5.7:\{ 3+16:8+11.5\} = 120-5.7:\{ 3+16:8+11.5\} = 120-5.7:\{ 3+16:8+11.5\} = 120-5.7:\{ 3+16:8+11.5\} = 120-5.7:\{ 3+16:8+11.5\} = 120-5.7:\{ 3+16:8+11.5\} = 120-5.7:\{ 3+16:8+11.5\} = 120-5.7:\{ 3+16:8+11.5\} = 120-5.7:\{ 3+16:8+11.5\} = 120-5.7:\{ 3+16:8+11.5\