1 . 9/10-1/5-1/4 =2. 3/5+ 6/10-1/2 =3.ada di gambar

1 . 9/10-1/5-1/4 =2. 3/5+ 6/10-1/2 =3.ada di gambar

Jawaban:

$frac{9}{10} - frac{1}{5} - frac{1}{4} = \ samakan : penyebutnya : dahulu \ \ frac{9}{10} - frac{1}{5} - frac{1}{4} = frac{18 - 4 - 5}{20} \ \ = frac{9}{20}$

2).

$frac{3}{5} + frac{6}{10} - frac{1}{2} = \ samakan : penyebutnya : dahulu \ \ frac{3}{5} + frac{6}{10} - frac{1}{2} = frac{6 + 6 - 5}{10} \ \ = frac{7}{10}$

$2 frac{2}{3} - 2 frac{5}{12} + 2 frac{1}{4} = frac{8}{3} - frac{29}{12} + frac{9}{4} \ \ = frac{32 - 29 + 27}{12} \ \ = frac{30}{12} \ \ = frac{5}{2} \ \ = 2 frac{1}{2}$

semoga membantu. ｡^‿^｡

Jawab:

1. 9/20

2. 7/10

3. 2 1/2

Penjelasan dengan langkah-langkah:

1. 9/10 – 1/5 – 1/4 =

(18-4-5)/20 =

= 9/20

2. 3/5 + 6/10 – 1/2 =

(6+6-5)/10 =

= 7/10

3. 2 2/3 – 2 5/12 + 2 1/4 =

2+2/3 – 2-5/12 + 2+1/4 =

(2-2+2) + (2/3 – 5/12 + 1/4) =

2 + (2/3 – 5/12 + 1/4) =

2 + 1/2 =

= 2 1/2

Semoga bisa membantu…