Question

Đã trả lời bởi chuyên gia

Answer 1

$\sqrt{\frac{4}{9}} - \frac{1}{2} : {(- \frac{1}{2})}^{2} = \frac{2}{3} - \frac{1}{2} : \frac{1}{4} = \frac{2}{3} - \frac{1}{2} x \frac{4}{1} = \frac{2}{3} - 2 = - \frac{4}{3}$
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Answer 2

a) √(4/9) – 1/2 : (–1/2)²
= 2/3 – 1/2 : 1/4
= 2/3 – (1/2 × 4/1)
= 2/3 – 2
= –4/3

→ Kết quả: –4/3

b) (40% – 1 2/3) : (–3/2) + (–1/2)²
= (0.4 – 1.666...) : (–1.5) + 0.25
= (–1.266...) ÷ (–1.5) + 0.25
= 0.844... + 0.25
≈ 1.09

→ Kết quả xấp xỉ: 1.09

c) 5/14 – 3,7 – 19/14 + 8/9 – 6,3
= (5/14 – 19/14) + (8/9) – (3.7 + 6.3)
= (–1) + 0.888... – 10
≈ –10.11

→ Kết quả xấp xỉ: –10.11

d) –3 – 16/23 – √(4/49) – 7/23 + (–3)² / 7
= –3 – 23/23 – 2/7 + 9/7
= –4 + 1
= –3

→ Kết quả: –3

e) –(8/9 + 7/5 – 2/11) + (–2/5 + 17/9 – 13/11)
= –(1.591) + (0.964)
≈ –0.63

→ Kết quả xấp xỉ: –0.63

f) 1/7 × 3/8 + 1/7 × 5/8 + (–1)^2019 / 7
= (3/56 + 5/56) + (–1)/7
= 8/56 – 8/56
= 0

→ Kết quả: 0

g) 4/5 × 3/7 – (–4/7) : √(25/16) – (–1)^0
= 12/35 + 4/7 ÷ (5/4) – 1
= 12/35 + (4/7 × 4/5) – 1
= 12/35 + 16/35 – 1
= 28/35 – 1
= –7/35
= –1/5

→ Kết quả: –1/5

h) (–2/3)² × 5/13 – 8/13 : (–9/4) – 1/2
= (4/9 × 5/13) – (8/13 × –4/9) – 1/2
= 20/117 + 32/117 – 1/2
= 52/117 – 1/2
≈ 0.444 – 0.5 = –0.056

→ Kết quả xấp xỉ: –0.06

i) (4/9)^11 × (2/3)^12 : (8/27)^10
= (4^11 × 2^12) / (9^11 × 3^12) × (27^10 / 8^10)
= (2^34 × 3^30) / (3^34 × 2^30)
= (2^4) / (3^4)
= 16/81

→ Kết quả: 16/81

j) (2/7 + 2/5 + 2/17 – 2/25) / (3/14 + 3/10 + 3/34 – 3/50)
= 2 × (1/7 + 1/5 + 1/17 – 1/25) / [3 × (1/14 + 1/10 + 1/34 – 1/50)]
≈ (2 × 0.2615) / (3 × 0.1223)
= 0.523 / 0.3669 ≈ 1.43

→ Kết quả xấp xỉ: 1.43

cre by : chatgpt

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Answer 3