1. hasil dari 2/5 X ( 3/4 + 7/8 - 5/16 ) adalah 2. 3,4: (2/10x1,8) = n nilai n yang tepat adalah 3. (1/4 + 1/6) X 3/5 :2/9 = tolong bantu jawab pakek caranya...

1 ) 2/5 × ( 3/4 + 7/8 - 5/16 )
= 2/5 × ( 12/16 + 14/16 - 5/16 )
= 2/5 × ( 26/16 - 5/16 )
= 2/5 × 21/16
= 21/40

2) 3,4 : ( 2/10 × 1,8 )
= 34/10 : ( 2/10 × 18/10 )
= 34/10 : 9/25
= 10/34 × 9/25
= 9/85

3) ( 1/4 + 1/6 ) × 3/5 : 2/9
= ( 3/12 + 2/12 ) × 3/5 : 2/9
= 5/12 × 3/5 : 2/9
= 1/4 : 2/9
= 4/1 × 2/9
= 8/9

Smoga membantu :) ^ ^