Question

Ajutor ex 18 a) b) c )

Answer 1

a.23.7(3.8+1.2)=23.7*5=118.5
b.1.43(1+2+3+....+11)=1.43*11(11+1)supra2
=1.43*11*12/supra2
=1.43*11*6(simplificam 12 cu 2)
1.43*66=94.38
2.54(1+2+3+....+11)=
=2.54*11(11+1)supra2
=2.54*11*12/supra2
=2.54*11*6(supra2)
=2.54*66
=167.64
coroana???