6th Class Mathematics Decimals

  • question_answer 32) Subtract. (a) ` 18.25 from ` 20.75 (b) 202.54 m from 250 m (c) ` 5.36 from ` 8.40 (d) 2.051 km from 5.206 km (e) 0.314 kg from 2.107 kg

    Answer:

    (a) We have, ` 20.75 ? ` 18.25 Now,

    Tens Ones Tenths Hundredths
    2 0 7 5
    ? 1 8 2 5
    2 5 0
    \[\because \] ` 20.75 ? ` 18.25 = ` (20.75 ? 18.25) = ` 2.50 (b) We have, 250 m ? 202.54 m Now,
    Hundreds Tens Ones Tenths Hundredths
    2 5 0 0 0
    ? 2 0 2 5 4
    4 7 4 6
    \[0.75=\frac{75}{100}=\frac{75\div 25}{100\div 25}=\frac{3}{4}\] 250 m ? 202.54 m = (250 ? 202.54) m = 47.46 m (c) We have, ` 8.40 ? ` 5.36 Now,
    Ones Tenths Hundredths
    8 4 0
    ? 5 3 6
    3 0 4
    \[\because \]` 8.40 ? ` 5.36 = ` (8.40 ? 5.36) = ` 3.04 (d) We have, 5.206 km ? 2.051 km Now,
    Ones Tenths Hundredths Thousandths
    5 2 0 6
    ? 2 0 5 1
    3 1 5 5
    \[0.18=\frac{18}{100}=\frac{18\div 2}{100\div 2}=\frac{3}{4}\] 5.206 km ? 2.051 km = (5.206 ? 2.051) km = 3.155 km (e) We have, 2.107 kg ? 0.314 kg
    Ones Tenths Hundredths Thousandths
    2 1 0 7
    ? 0 3 1 4
    1 7 9 3
    \[\because \] 2.107 kg ? 0.314 kg = (2.107 ? 0.314) kg = 1.793 kg


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