यहाँ आपके होमवर्क के प्रश्न 1 से 7 के हल दिए गए हैं:

    $$
    \frac{2 \times 10}{7 \times 10} + \frac{1 \times 14}{5 \times 14} + \frac{3 \times 7}{10 \times 7} = \frac{20}{70} + \frac{14}{70} + \frac{21}{70}
    $$

    $$
    \frac{20 + 14 + 21}{70} = \frac{55}{70}
    $$

    $$
    \frac{55 \div 5}{70 \div 5} = \boxed{\frac{11}{14}}
    $$

    $$
    \frac{19 \times 3}{20 \times 3} - \frac{8 \times 4}{15 \times 4} = \frac{57}{60} - \frac{32}{60}
    $$

    $$
    \frac{57 - 32}{60} = \frac{25}{60}
    $$

    $$
    \frac{25 \div 5}{60 \div 5} = \boxed{\frac{5}{12}}
    $$

    $$
    \frac{16}{8} \times \frac{15}{35} \times \frac{14}{22}
    $$

    $$
    2 \times \frac{3}{7} \times \frac{7}{11}
    $$

    $$
    \frac{2 \times 3 \times 7}{1 \times 7 \times 11} = \frac{42}{77}
    $$

    $$
    \frac{42 \div 7}{77 \div 7} = \boxed{\frac{6}{11}}
    $$

    $$
    3\frac{1}{6} = \frac{(3 \times 6) + 1}{6} = \frac{19}{6}
    $$
    $$
    7\frac{1}{5} = \frac{(7 \times 5) + 1}{5} = \frac{36}{5}
    $$

    $$
    \frac{19}{6} \times \frac{36}{5}
    $$

    $$
    \frac{19}{1} \times \frac{6}{5} = \frac{114}{5}
    $$

    $$
    \frac{114}{5} = \boxed{22\frac{4}{5}}
    $$

    $$
    \frac{91}{36} \times \frac{48}{26}
    $$

    $$
    \frac{91 \div 13}{26 \div 13} = \frac{7}{2}
    $$
    $$
    \frac{48 \div 12}{36 \div 12} = \frac{4}{3}
    $$

    $$
    \frac{7}{3} \times \frac{4}{2} = \frac{28}{6}
    $$

    $$
    \frac{28 \div 2}{6 \div 2} = \frac{14}{3} = \boxed{4\frac{2}{3}}
    $$

    $$
    \frac{24}{38} \times \frac{57}{66}
    $$

    $$
    \frac{24 \div 6}{66 \div 6} = \frac{4}{11}
    $$
    $$
    \frac{57 \div 19}{38 \div 19} = \frac{3}{2}
    $$

    $$
    \frac{4}{11} \times \frac{3}{2} = \frac{12}{22}
    $$

    $$
    \frac{12 \div 2}{22 \div 2} = \boxed{\frac{6}{11}}
    $$

$$
\text{एक बॉक्स में पेंसिल} = 2568
$$

$$
\text{बॉक्सों की संख्या} = 316
$$

$$
\text{कुल पेंसिल} = 2568 \times 316
$$
$$
2568 \times 316 = 810928
$$

$$
\text{316 बॉक्स में कुल पेंसिल} = \boxed{810928}
$$

$$
\text{कुल पेज} = 25652
$$

$$
\text{दिनों की संख्या} = 11
$$

$$
\text{प्रत्येक दिन पढ़े गए पेज} = \frac{25652}{11}
$$
$$
\frac{25652}{11} = 2332
$$

$$
\text{प्रत्येक दिन पढ़े गए पेज} = \boxed{2332}
$$

    $$
    36 + 25 + 18
    $$

    $$
    61 + 18 = \boxed{79}
    $$

    $$
    -63 - 85 - 20
    $$

    $$
    -148 - 20 = \boxed{-168}
    $$

    $$
    33 - 46
    $$

    $$
    \boxed{-13}
    $$

    $$
    88 - 14
    $$

    $$
    \boxed{74}
    $$