A
=-2•{-2•[-2•105+1]}+840
=-2•{-2•[-210+1]}+840
=-2•{-2•(-209)}+840
=-2•418+840
=-836+840
=4
B
=4•5•5+36÷(-3)²
=100+36÷9
=100+4
=104
C
=121+2•(-27)-(-5)•4
=121-54-20
=67-20
=47
D
=-216+1+9+4-1
=-215+9+4-1
=-206+4-1
=-202-1
=-203
F
={[3+17÷(-17)]+[1-4÷(-4)]}•10+3
={[3-1]+[1-1]}•10+3
={2+0}•10+3
=2•10+3
=20+3
=23
G
=16-40+4-75÷(-25)
=16-40+4-3
=-24+4-3
=-20-3
=-23
Sper ca te ajuta
