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Calculeaza deamanuntit nu direct ;
a) 9 + 8 x 5 - 3 x 4 + 58 =
b) 13 x ( 15 - 7 ) + 8 x 9
c ) 9 + 7 x 5 - ( 19 - ( 5 +4))


Răspuns :

a) 9+8x5-3x4=58=9+40-125858=49-12+58=37+58=95
b) 13x(15-7)+8x9=13x8+72= 104+72=176
c) 9+7x5-[19-(5+4)]=9+35-[19-9]=44-10=34