DRILL IN REDUCTION OF FRACTIONS DRILL IN REDUCTION OF FRACTIONS Change to all possible fractions as directed: 2. to all possible fractions up to 18ths. 73 CHANGING FRACTIONS TO COMMON DENOMINATORS Changing fractions to the same denominator is called changing to a common denominator. 1. Change,, and to the least common denominator. The fractions we usually have to add or subtract in the problems of everyday life are: halves, fourths, eighths, sixteenths, thirds, sixths, ninths, and twelfths. learn: Hence, = ADDING FRACTIONS AND MIXED NUMBERS 75 ADDING FRACTIONS AND MIXED NUMBERS (REVIEW) A number like 32 consisting of a whole number and a fraction is called a mixed number. 1. Frank delivered five orders for a butcher, carrying them all in a basket attached to the front of his bicycle. They weighed 51 lb., 37 lb., 21 lb., 43 lb., and 6 lb. Find the weight of all. SUBTRACTING FRACTIONS AND MIXED NUMBERS (REVIEW) 1. If you cut an apple into four equal parts and give away 3 of the parts, what part of the apple is given away and what part is left? 2. If a cake is cut into eight equal parts and 3 of them are eaten, what part of the cake is eaten and what part of it is left? 3. From a jar containing 5 lb. of sugar, Nell took 14 lb. to make candy. How much remained? 4. From a piece of ribbon 32 yd. long, Helen used 21 yd. How much remained? 6414 61% 23% 10. John's height is 644 in. and Frank's is 617 in. How much taller is John than Frank? 7 Then think, Write Write 2. Think," is larger than 1." Think, "2 and 2 are 4." TESTING THE WORK IN FRACTIONS 77 16. If John weighs 81 lb. and Frank weighs 78 lb., how much heavier is John than Frank? 17. If one bag of potatoes weighs 115 lb. and another weighs 1137 lb., how much heavier is the first bag? 18. John had a pig that weighed 987 lb. on September 1, and 116 lb. on October 1. How much did it gain during the month? TESTING THE WORK IN FRACTIONS Test I 1. When an object is divided into a number of equal parts, each part is 2. The 3. The the fraction. unit. of the fraction names the fractional unit. tells how many fractional units make up 4. Name the fractional unit and tell how many: 5. In the above fractions, tell how many fractional units make a whole unit. 6. A fraction whose numerator is equal to or greater than its denominator is called an 7. Name five improper fractions. 8. A number composed of a whole number and a fraction is called a 9. To change an improper fraction to a whole or mixed number the by the 10. Change to whole or mixed numbers: |