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