Răspuns
Explicație pas cu pas:
(84-7x8)+9x7=(84-56)+63=28+63=91
(42+6x9)-(5x5+9x3)=(42+54)-(25+27)=96-54=42
(6x8)-(43-6x4=48-(43-24)=48-19=29
100-(6x6+3x8)=100-(36+24)=100-60=40
54+(76-7x4)+8x9=54+(76-28)+72=54+48+72=174
(130-9x9+5x4)-97x5+3x6)=(130-81+20)-(35+18)=(49+20)-53=69-53=16
