Răspuns:
d) Calculează:
42:7•4:8•2•5:10•3•10 =
= 6•4:8•2•5:10•3•10 =
= 24:8•2•5:10•3•10 =
= 3•2•5:10•3•10 =
= 6•5:10•3•10 =
= 30:10•3•10 =
= 3•3•10 =
= 9•10 =
= 90
e) Află diferența numerelor a şi b, ştiind că:
a = (6+700:10+64):10 =
a = ( 6+70+64 ):10 =
a = ( 76+64 ):10 =
a = 140:10 =
a = 14
b = (500:100+400:2-165) • 10 =
b = (5+400:2-165) • 10 =
b = (5+200-165) • 10 =
b = (205-165) • 10 =
b = 40•10 =
b = 400
14 - 400 = -386
a b
400 - 14 = 386
b a