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,

    Answer:

    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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