Question

Tolong 1 sampai 5 yaaa....

Answer 1

Jawaban 1 sampai 3 semoga benar

Answer 2

1. 1 1/4 x 2 2/5
= 5/4 x 12/5
= ( 5 x 12 ) / ( 4 x 5 )
= 60 / 20
= 3
2. 2 3/4 + ( 5 1/3 x 5/8 ) - 4 2/5
= 11/4 + ( 16/3 x 5/8 ) - 10/5
= 11/4 + ( ( 16 x 5 ) / ( 3 x 8 ) ) - 10/5
= 11/4 + ( 80/24 ) - 10/5
= 11/4 + ( 3 8/24 ) - 10/5
= 11/4 + ( 3 2/6 ) - 10/5
= 11/4 + 3 1/3 - 10/5
= 11/4 + 10/3 - 10/5
= ( 33/12 + 40/12 ) - 10/5
= 73/12 - 10/5
= 365/60 - 120/60
= 245/60 = 4 5/60 = 4 1/12
3. 6 2/3 : 2 2/5 x 2 1/4 
= 20/3 : 12/5 x 9/4
= ( 20/3 x 5/12 ) x 9/4
= ( ( 20 x 5 ) : ( 3 x 12 ) ) x 9/4
= ( 100 : 36 ) x 9/4 
= 2,7777777778 x 9/4
= 25/4
= 6,25
4. ( 2 1/2 x 7 1/2 ) - ( 1 1/2 x 1 1/2 ) : 0,25
= ( 5/2 x 15/2 ) - ( 3/2 x 3/2 ) : 0,25
= ( ( 5 x 15 ) : ( 2 x 2 ) ) - ( ( 3 x 3 ) : ( 2 x 2 ) ) : 0,25
= ( 45 : 4 ) - ( 9 : 4 ) : 0,25
= 11,25 - 2,25 : 0,25
= 11,25 : 9
= 1,25
5. 14 2/7 x 14 + 16 2/3 x 18 - 11 1/9 x 27 
= 100/7 x 14 + 50/3 x 18 - 100/9 x 27 
= 1.400/7 + 900/3 - 2.700/9
= 200 + 300 - 300
= 500 - 300
= 200