Hitunglah hasil operasi berikut A.1/2×3/4-1/12 B.1/5+1/2×1/10 C.1/5÷(1/2-1/10) D.3/2-5%+8,20 E.1/4×3/8-1/12+1/2×1/10

Jawab :
a. ( 1/2 x 3/4 ) - 1/12
= 3/8 - 1/12
= ( 3/8 x 3 ) - ( 1/12 x 2 )
= 9/24 - 2/24
= 7/24 ( dalam desimal 0,29 )

b. 1/5 + ( 1/2 x 1/10 )
= 1/5 + 1/20
= ( 1/5 x 4 ) + 1/20
= 4/20 + 1/20
= 5/20 = 1/4 ( dalam desimal 0,25 )

c. 1/5 : ( 1/2 - 1/10 )
= 1/5 : { ( 1/2 x 5 ) - 1/10 }
= 1/5 : ( 5/10 - 1/10 )
= 1/5 : ( 4/10 )
= 1/5 : ( 4/10 : 2 )
= 1/5 : 2/5
= 1/5 ( dalam desimal 0,5 )

d. 3/2 - 5% + 8,20
= 3/2 - 5/100 + 820/100
= 9 13/20 ( dalam desimal 9,65 )

e. 1/4 x 3/8 - 1/12 + 1/2 x 1/10
= ( 1/4 x 3/8 ) - 1/12 + ( 1/2 x 1/10 )
= 3/32 - 1/12 + 1/20
= 29/480 ( dalam desimal 0,06 )