Tolong jawab Kalau tau nya 2/3 gk usah dijawab

1. 1/4
= 1/4 × 25/25
= 25/100
= 25%

2. 3 1/4 + 2 2/3 - 4 1/2
= 13/4 + 8/3 - 9/2
= 39/12 + 32/12 - 54/12
= 71/12 - 54/12
= 17/12
= 1 5/12

3. 2/3 × 1 1/2
= 2/3 × 3/2
= 6/6
= 1

4. 2 1/2 : 3/4
= 5/2 : 3/4
= 5/2 × 4/3
= 20/6
= 3 2/6
= 3 1/3

5. 1/2 × 2/5 : 3/10
= 1/2 × 2/5
= 2/10 : 3/10
= 2/10 × 10/3
= 20/30
= 2/3

6. 1 Simetri Lipat

7. 21 Buah Rusuk

8. Limas Segi Empat

9. Panjang = 16 m
Lebar = 8 m
Luas = Panjang × Lebar
Luas = 16 m × 8 m
Luas = 128 m2

10. Panjang = 20 dm
Lebar = 10 dm
Tinggi = 5 dm
Diisi air = 2/5 dari tingginya

Volume Balok
= p × l × t
= 20 × 10 × 5
= 1.000 dm

2/5 × Volume Balok
= 2/5 × 1.000 dm
= 400 liter