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6)a) 1/12+5/12+7/12b) 1 1/2 (this is mixed fraction not 11/2)+2 1/3 (this is mixed fraction)+6/15c) 2 1/3 (mixed fraction)+ 3 1/2 (mixed fraction)-1 1/4 (mixed fraction)7) Simplifya) 3/4 of 8/6b) 5 2/7 (mixed fraction) of 3/4c) 2/7 divided by 1/7d) 4 5/8 (mixed fraction) divided by 2 5/6 (mixed fraction)8) Sunita bought a 10 kg box of grapes from the market. She gave 3 1/2 (mixed fraction) to Reema and 2 1/4 (mixed fraction). How many kilograms of grapes does she have?9) Anita jogs 1 1/2 km (mixed fraction) in 1 hour. How many kilometers can she cover in 2 1/2 (mixed fraction)?Only those who know the answer post. I don’t want any unnecessary things such as “I don’t know” or anything like that. Or else you will be reported. Only those who know answer. |
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Answer» Answer: 6 a) all the denominators are same , so we just have to add the numerators 1/12 + 5/12 + 7/12 6/12 + 7/ 12 13/12 or B) 1 1/2 (this is mixed fraction not 11/2)+2 1/3 (this is mixed fraction)+6/15 first we have to convert all the mixed FRACTIONS into improper fractions 3/2 + 7/3 + 6/15 now we have to make the denominators same by lcm lcm of denominators = 30 3 x 15/2 x 15 + 7 x 10/3 x 10 + 6 x 2/15 x 2 45/30 + 70/30 + 12/30 = 127/30 or c) first we have to convert mixed fraction to improper fraction 7/3 + 7/2 + (- 5/4) now we have to make all the denominators same by USING lcm lcm of 3,2 and 4 = 12 (7 x 4/3 x 4) + (7 x 6/2 x 6) + (-5 x 3/4 x 3) 28/12 + 42/12 + (-15/12) 70/12 + (-15/12) now we have to SUBSTRACT 70 and 15 because one number is positive and other is negative 55/12 or 7) a) 3/4 of 8/6 means 3/4 x 8/6 3/4 x 8/6 1/4 x 8/2 (cancel 3 and 6 by 3) 1/1 x 2/2 (cancel 4 and 8 by 4) 2/2 or 1 b) 5 2/7 of 3/4 = 35/7 x 3/4 (mixed fraction) = 5/1 x 3/4 (cancel 35 and 7 by 7) = 15/4 or c) 2/7 ÷ 1/7 = 2/7 x 7/1 = 2/1 x 1/1 (cancel 7 and 7 by 7) = 2/1 or 2 d) i don't KNOW 8) i don't know 9) speed =distance/time =5.5/1 km/hr distance=speed×time = 5.5×21/2 = 2.25×21 = 47. 25 km |
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