150. Oral Using aliquot parts, reduce the following to mixed numbers: 151. At sight, reduce the following to common fractions or 153. A fraction in lowest terms whose denominator contains other prime factors than 2 and 5 cannot be reduced to an exact entire decimal; e.g. 3, 9, 22' 11' 26' 35' 5 15 8 19 41 Such a fraction may be reduced to a decimal of nearly the same value by carrying the division to a certain number of decimal places, thus : Reduce 18 to a decimal of four places. REVIEW AND PRACTICE 156. Oral 1. Read: .0305; 42.0042; 4.0004; 6.395; .0600; 639.500; 639.00005; 10.10; 36; 50.005. 2. Express as common fractions in lowest terms: .5; .25; .75; .121; .371; .871; .163; .331; .621; .66; .081; .02. 3. Divide by 10: 62; 93.5; 3.44; .25; .0081; .0384; 1.027. 4. Multiply by 1000: 8.934; .0245; .612356; 48; 63.05. 5. Give results: 436 × 100; 436 ÷ 1000; 436 × 10; 5 ÷ 100; 8314 ÷ 10,000; 6.183 x 10,000. 6. Express as common fractions in lowest terms: .4; .60; .8; .500; .70; .200; .600. 7. How may decimals be divided by 10? by 100? by 10,000? by 1,000,000? by 1000? 8. A stamp clerk received $4085 for special delivery stamps at 10 cents apiece. How many such stamps did he sell? 9. Compare $ with $1; $ with $3. 10. Compare 1 bushel with of a bushel; 5 bushels with 5 of a bushel. 11. What will 3 months' rent cost at $240 a year? 12. What will a dozen cabbages cost at the rate of 3 for 25¢? |