Kaka bantu dong soal mtk sulit

Kaka bantu dong soal mtk sulit

1. = ⅜ + 9/4

= 3/8 + 18/8

= 21/8

= 2 5/8 = D

2. = 13/6 – 5/9

= 39/18 – 10/18

= 29/18

= 1 11/18 = C

3. = 5¼ – 1⅔

= 21/4 – 5/3

= 63/12 – 20/12

= 43/12

= 3 7/12 kg = D

4. = 28/10 × 3/7

= 84/70

= 1 14/70

= 1 1/5 = B

5. = 4/15 : 54/10

= 4/15 × 10/54

= 40/810

= 4/81 = A

Jawaban:

$frac{3}{8} + 2 frac{1}{4} \ = frac{3}{8} + frac{9}{4} \ = frac{3}{8} + frac{18}{8} \ = frac{3 + 18}{8} \ = frac{21}{8} \ = 2 frac{5}{8}$

$2 frac{1}{6} - frac{5}{9} \ = frac{13}{6} - frac{5}{9} \ = frac{39}{18} - frac{10}{18} \ = frac{39 - 10}{18 } \ = frac{29}{18} \ = 1 frac{11}{18}$

$5.25 = 5 frac{25}{100} = 5 frac{1}{4} \ \ 5 frac{1}{4} - 1 frac{2}{3} \ = frac{21}{4} - frac{5}{3} \ = frac{63}{12} - frac{20}{12} \ = frac{63 - 20}{12} \ = frac{43}{12} \ = 3 frac{7}{12}$

$2.8 = frac{28}{10} = frac{14}{5} \ \ frac{14}{5} times frac{3}{7} = frac{2}{5} times frac{3}{1} = frac{6}{5} = 1 frac{1}{5}$

$5.4 = frac{54}{10} = frac{27}{5} \ \ frac{4}{15} div frac{27}{5} = frac{4}{15} times frac{5}{27} = frac{4}{3} times frac{1}{27} = frac{4}{81}$

#maite_mereya