Calcule o valor das expressões
A)(0,5).(-1,4+2,1)
B)1/2+1/4.(-7/2)-5/4.(-1/8)
C)(9/4+7/2)+{3/16.9-(-10)-7/2}
ME AJUDEM
A)(0,5).(-1,4+2,1)
B)1/2+1/4.(-7/2)-5/4.(-1/8)
C)(9/4+7/2)+{3/16.9-(-10)-7/2}
ME AJUDEM
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0,5×(-1,4+2,1)
0,5×0,7
0,35
b)
1/2+1/4×(-7/2)-5/4×(-1/8)
1/2-7/8+5/32
16-28+5/32
-7/32
c)
(9/4+7/2)+(3/16×9-(-10)-7/2)
9+14/4+(27/16+10-7/2)
23/4+27+160-56/16
23/4+131/16
92+131/16
223/16