Question

Calculeaza: a) (18+2×7):(12:2+8:4) ;b) 24-24:3×(72:9-2×3):4×5 ; c) 36:6+4×2×5-(20-12:3); d) 42:7+(6+6):2-24:(5+3) ; e) (25+20):5-(19+5):8 ;f) 10+(10:10+10)_(10×1+10) Ma poate ajuta cineva la acest ex.?

Answer 1

Răspuns:

a) (18+2x7):(12:2+8:4)=18+14:(6+2)=32:8=4

b) 24-24:3x(72:9-2x3):4x5=24-24:3x(8-6):4x5=24-24:3x2:4x5=24-8x2:4x5= 24-16:4x5=24-4x5=24-20=4

c) 36:6+4x2x5-(20-12:3)= 6+8x5-(20-4)=6+40-24=46-24=22

d) 42:7+(6+6):2-24:(5+3)=6+12:2-24:8=6+6-3=12-3=9

e) (25+20):5-(19+5):8=45:5-24:8=9-3=6

f) 10+(10:10+10)-(10x1+10)=10+(1+10)-(10+10)=10+11-20=21-20=1

Sper ca e corect tot (am facut in graba) deci banuiesc ca vor mai fi greseli dar totusi sper ca nu vor fi. Succes la scoala! :)