hasil dari 0,45+1 1/2-1/2×80% adalah

■ 0,45 = 45/100
            = 9/20
■ 1 1/2 = 3/2
■ 80% = 80/100
            = 4/5

0,45 + 1 1/2 - 1/2 × 80%
= 9/20 + 3/2 - ( 1/2 × 4/5 )
= 9/20 + 3/2 - 2/5
= 9/20 + 30/20 - 8/20
= 31/20
= 1 11/20[tex] [/tex]