Question

Resolva a expressão numérica

1) -8+{8-12)+(13+12)]-10}
2) 3-{2+(11-15)-[5+(-3+1)+8}
3) [-1+(22-5•6)]÷(-5+2)+1
4) [(24-8)•2-24]÷[22-(-3+2)]

Answer 1

1) -8+{[4+25]-10}
-8+{29-10}
-8+19= +11

2) 3-{2+4-[5+(-3+1)+8}
3-{2+4-[5+(-2)+8}
3-{2+4-5-2+8}
3-9=-6

3) [-1+(22-30)]÷(-3+1)
[-1-8]÷(-3+1)
[-1-8]÷-2
-9÷-2= -4,5

4) [16•2-24]÷[22-(-3+2)]
[16•2-24]÷[22-1]
[32-24]÷21
8÷21=0,380...