a) \(\dfrac{1}{2}\)x45+0,5x37+\(\dfrac{5}{10}\)x18
= \(\dfrac{1}{2}\)x45+\(\dfrac{1}{2}\)x37+\(\dfrac{1}{2}\)x18
=\(\dfrac{1}{2}\)x(45+37+18)
=\(\dfrac{1}{2}\)x100
=50
1/2x 45 + 0,5 x 37 + 5/10 x 18
=22,5+18.5+5/10x18
=41+9
=50
a) 510510x18
= 1212x37+1212x(45+37+18)
=