Question

Calculeaza.respecta regulile invatate.a) (7×7+7)×7.b)(20:2+28)×2 c)(18×2+18):6 d)196-3×(89-45) e)36×2×(12+47) f)15+60:(30-29) g)1000-(35+60×2)+40 h)999+(10:2×4)-501 j)50+(40+80×100)-50

Answer 1

A=(7×7+7)×7
=(49+7)×7
=56×7
=392

B=(20÷2+28)
=10+28
=38

C=(18×2+18)÷6
=(36+18)÷6
=54÷6
=9

D=196-3×(89-45)
=196-3×44
=196-132
=64

E=36×2×(12+46)
=36×2×59
=4248

F=15+60÷(30-29)
=15+60÷1
=15+60
=75

G=1000-(35+60×2)
=1000-(35+120)
=1000-155
=845

H=999+(10÷2×4)-501
=999+(5×4)-501
=999+20-501
=1019-501
=518

J=50+(40+80×100)-50
=50+(40+800)-50
=50+840-50
=890-50
=840