Matematika Sekolah Dasar bantu kakakakakakakakkakakaka​

bantu kakakakakakakakkakakaka​ 1. 5/8 + 1 1/2 - 4/5
= 5/8 + 3/2 - 4/5
= 25/40 + 60/40 - 32/40
= 53/40
= 1 13/40

2. 3 2/3- 1,4 x 1 1/3
= 11/3 - 7/5 x 4/3
= 55/15 - 21/15 x 20/3
= 34/15 x 20/3
= 680/3
= 226 2/3

C. 3 x (-1,25) + 4/5 -2 1/2
= 3 x (-1,25) + 0,80 - 2,50
= (-3,75) + 0,80 - 2,50
= (-3,75) - 1,70
= (-5,45)

D. 1/2 : 3/4 x 2,5 + 1 1/3
= 1/2 x 4/3 x 2,5 + 4/3
= 4/6 x 2,5 + 4/3
= 4/6 x 15/6 + 4/3
= 4/6 x 15/6 + 8/6
= 60/6 + 8/6= 68/6
= 12 2/6 [answer.2.content]