6th Class Mathematics Decimals

  • question_answer 31) Ravi purchased 5 kg 400 g rice, 2 kg 20 g sugar and 10 kg 850 g flour. Find the total weight of his purchases. TIPS Firstly, write the weight in kg using decimals and then add by putting one below other same as whole numbers,


    Weight of rice purchased by Ravi = 5 kg 400 g = 5 kg + 400 g \[23+\frac{2}{10}+\frac{6}{1000}\] \[700+20+5+\frac{9}{100}\] \[20+9+9+\frac{4}{10}+\frac{1}{100}=29+4\times \frac{1}{10}+1\times \frac{1}{100}\] Weight of sugar purchased by Ravi \[=29+0.4+0.01=29.41\] \[137+\frac{5}{100}\] \[=137+0\times \frac{1}{10}+5\times \frac{1}{100}=137+0+0.05=137.05\] \[\frac{7}{10}+\frac{6}{100}+\frac{4}{1000}\] Weight of flour purchased by Ravi = 10 kg 850 g = 10 kg + 850 g \[=7\times \frac{1}{10}+6\times \frac{1}{100}+4\times \frac{1}{1000}\] \[=0.7+0.06+0.004=0.764\] \[23+\frac{2}{10}+\frac{6}{1000}=23+2\times \frac{1}{10}+0\times \frac{1}{100}+6\times \frac{1}{1000}\] \[=23+0.2+0+0.006=23.206\] Total weight of his purchases \[700+20+5+\frac{9}{100}\] Hence, total weight of all his purchases is 18.270 kg.

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