Question

Tlong di bantu dong kak, tapi ngak boleh ngasal, kalau ngak nanti aq laporin​

Answer 1

1.

a. 11 6/15 × 2 18/20 ÷ 7,2 + 1 8/9

= 171/15 × 58/20 × 72/10 + 17/9

= 171/15 × 29/10 × 36/5 + 17/9

= 171/15 × 29/10 × 5/36 + 17/9

= (171 × 29 × 5/15 × 10 × 36) + 17/9

= (4.959 × 5/150 × 36) + 17/9

= 24.795 ÷ 45/5.400 ÷ 45 + 17/9

= 551/120

= 4 71/120

b. 33 1/2 - 7 × 8 ÷ 2 - 5,5

= 67/2 - 7/1 × 8/1 × 2/1 - 55/10

= 67/2 - (7 × 8 × 2/1 × 1 × 1) - 11/2

= 67/2 - (56 × 2/1 × 1) - 11/2

= 67/2 - 112/1 - 11/2

= (2 ÷ 2) × 67 - (2 ÷ 1) × 112 - (2 ÷ 2) × 11/2

= (1 × 67) - (2 × 112) - (1 × 11)/2

= 67 - 224 - 11/2

= -157 - 11/2

= -168/2

= (-84)

c. 25 - 3/2 - 2 ÷ 1 5/7 × 3

= 25/1 - 3/2 - 2/1 × 12/7 × 3/1

= 25/1 - 3/2 - 2/1 × 7/12 × 3/1

= 25/1 - 3/2 - (2 × 7 × 3/1 × 12 × 1)

= 25/1 - 3/2 - (14 × 3/12 × 1)

= 25/1 - 3/2 - 42/12

= 25/1 - 3/2 - 21/6

= (6 ÷ 1) × 25 - (6 ÷ 2) × 3 - (6 ÷ 6) × 21/6

= (6 × 25) - (3 × 3) - (1 × 21)/6

= 150 - 9 - 21/6

= 141 - 21/6

= 120/6

= 20

d. 2/3 × (0,72 ÷ 12/25) + 3 - 5/10

= 2/3 × (72/100 × 12/25) + 3/1 - 1/2

= 2/3 × (36/50 × 25/12) + 3/1 - 1/2

= 2/3 × (18/25 × 25/12) + 3/1 - 1/2

= 2/3 × (18 × 25/25 × 12) + 3/1 - 1/2

= 2/3 × 450/300 + 3/1 - 1/2

= 2/3 × 3/2 + 3/1 - 1/2

= (2 × 3/3 × 2) + 3/1 - 1/2

= 6/6 + 3/1 - 1/2

= 1/1 + 3/1 - 1/2

= (2 ÷ 1) × 1 + (2 ÷ 1) × 3 - (2 ÷ 2) × 1/2

= (2 × 1) + (2 × 3) - (1 × 1)/2

= 2 + 6 - 1/2

= 8 - 1/2

= 7/2

= 3 1/2