tolong d bantu yh buat sekarang nih,pless

1. 1 1/2 × 3 1/4 ÷ 2 1/2

3/2 × 13/4 ÷ 5/2

3/2 × 13/4 × 2/5

3×13×2/2×4×5

78÷2/40÷2

39/20 atau 1 19/20


2. 1/7 - 2/5

1×5/7×5 - 2×7/5×7

5/35 - 14/35

-9/35


3. 2 1/5 - 1 3/7

11/5 - 10/7

11×7/5×7 - 10×5/7×5

77/35 - 50/35

27/35


4. 2/8 + 3/8 - 1/2

5/8 - 1/2

5×2/8×2 - 1×8/2×8

10/16 - 8/16

2÷2/16÷2

1/8


5. 2/3 + 3/5 - 1 2/3

2/3 + 3/5 - 5/3

2×5×3/3×5×3 + 3×3×3/5×3×3 - 5×5×3/3×5×3

30/45 + 27/45 - 75/45

-18÷9/45÷9

-2/5