15/4 + 8/3 = 3/5 + 7/4 = 18/5 - 4/3 = 18/7 x 21/3 = 8/3 : 4/12 =

Jawabannya:

Mapel : Matematika
Bab : Operasi Pecahan
Sub Bab : Pecahan

Pembahasan:

1). 15/4 + 8/3
= 45/12 + 32/12
= 77/12
= 6 5/12

2) 3/5 + 7/4
= 12/20 + 35/20
= 47/20
= 2 7/20

3). 18/5 - 4/3
= 54/15 - 20/15
= 74/15
= 4 14/15

4) 18/7 × 21/3
= 378/21
= 18

5). 8/3 : 4/12
= 8/3 : 1/3
= 8/3 × 3/1
= 24/3
= 8

# Maaf Kalo Salah

[tex]1. \frac{15}{4} + \frac{8}{3} = \frac{45}{12} + \frac{32}{12} = \frac{77}{12} = 6 \frac{5}{12} \\ 2. \frac{3}{5} + \frac{7}{4} = \frac{12}{20} + \frac{35}{20} = \frac{47}{20} = 2 \frac{7}{20} \\ 3. \frac{18}{5} - \frac{4}{3} = \frac{54}{15} - \frac{20}{15} = \frac{34}{15} = 2 \frac{4}{15} \\ 4. \frac{18}{7} \times \frac{21}{3} = 18 \\ 5. \frac{8}{3} \div \frac{4}{12} = \frac{8}{3} \times \frac{12}{4} = 8[/tex]