(1) a. 1 1/2 + 5

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b. 1/3 – (-1)

(2)a.7/9 × 2/21
b. 3/7 × (-3 1/6)

(3)a.5 : 3/4
b. 3 3/7 : 2/ 2/3

(4)a.(7/8)²
b. ((5/8)²)³

(5)Diketahui:
a. 1/3,,b.3/4,,c.2/5

tentukan lah nilai dari:
a. (b-c) ×a
b. 2/3 b – 1/2 c​

(1) a. 1 1/2 + 5

Jawab:

Penjelasan dengan langkah-langkah:

1a.   1frac{1}{2} + 5 = 6frac{1}{2}

1b.   frac{1}{3} - (-1) = frac{1}{3} + 1 = 1frac{1}{3}

2a.   frac{7}{9} . frac{2}{21} = frac{3}{27} = frac{1}{9}

2b.   frac{3}{7} . (-3frac{1}{6} ) = frac{3}{7} .(-frac{19}{6}) = -frac{19}{14} = -1frac{5}{14}

3a.   5 : frac{3}{4} = 5 . frac{4}{3} =frac{20}{3} = 6frac{2}{3}

3b.   3frac{3}{7} : 2frac{2}{3} = frac{24}{7} : frac{8}{3} = frac{24}{7} . frac{3}{8} = frac{9}{7} = 1frac{2}{7}

4a.   (frac{7}{8} )^{2} =frac{49}{64}

4b.   (frac{5}{8} ^{2} )^{3} =(frac{5}{8} )^{6} =frac{15625}{262144}

5a.   (b-c) . a = (frac{3}{4} - frac{2}{5} ).frac{1}{3} =frac{15-8}{20} . frac{1}{3} =frac{7}{20}. frac{1}{3} =frac{7}{60}

5b.   frac{2}{3} b - frac{1}{2} c = frac{2}{3} frac{3}{4} - frac{1}{2} frac{2}{5} = frac{1}{2}-frac{1}{5} = frac{5-2}{10} = frac{3}{10}