6. 1 qt. is -fourth of 1 gal. 1 qt. is % of 1 gal. 7. 1 ft. is — third of 1 yd. 1 ft. is—% of 1 yd. fourth of 12 in. 3 in. are 8. 3 in. are 12 in. 9. 6 in. are 10. 2 pt. are 11. 5 men are % of of 15 men. 12. 6 men are of men. 13. 12 men are of men. men. 12 men are 40% of 14. $5 is of $- $5 is 20% of $ 15. 16 men are of men. men. 16 men are 50% of 16. A boy sold an article for gained what part of the cost? Find the cost. of its cost. He He gained 5 cents. 17. 5% of my money is $25. Find 1% of my money. Find 100% of my money. 1ST BK ARITI-16 367. Written Exercises. 1. Divide 4.628 by 89. MODEL: .052 89)4.628 4 45 178 178 Place the decimal point in the quotient above and after the order in the dividend that corresponds to the lowest order in the divisor, in this case, units. 89 is contained in 4 no times. This shows that there is no whole number in the quotient. Do not write the 0 in the quotient. 89 is contained in 46 no times. Write the 0 in tenths' place in the quotient. 462 will contain 89. Complete the division. 2. Divide each by 87: 20.01, 391.5, 7.743, 2.2815. 3. Divide each by 7.9: 1.6195, 24.174, .32232, 481.11. 4. Divide each by 5.23: 42.886, .8368, 2615. 5. A boy paid $.12 for 6 oranges. Find the cost of 1 orange. 6. A boy paid $.06 for 12 apples. of 1 apple. Find the cost 7. A farmer sold 220 boxes of apples for $121. Find the selling price per box. 8. Find what per cent 8 is of 16; 12 is of 48; 9 is of 72; 64 is of 128. 9. Find what per cent 45 is of 50; 40 is of 50; 30 is of 20. 368. To multiply a number by 25, 331, 66, 50, etc., multiply the number by 100 and take such a part of the product as the multiplier is of 100. 1. Multiply 624 by 25. MODEL: 15600 25 is of 100. Multiply 624 4)62400 by 100, and take of the product. 2. Multiply: 78 by 662; 69 by 331; 240 by 371; 240 by 621; 480 by 75. 3. Multiply: 360 by 25; 1876 by 75; 1728 by 12; 5280 by 33; 144 by 50. 369. To divide a number by 25, 331, 371, 66, 75, etc., divide the number by 100 and multiply the result by the inverted form of the fraction that indicates the part the multiplier is of 100. 2. Divide: 982 by 331; by 75; by 663; by 621; by 371. 3. Divide: 1728 by 75; 5280 by 371; 5760 by 331; 640 by 121; 6335 by 142. 370. To divide a number by 200, 300, 2000, etc., point off as many places from the right as there are ciphers in the divisor, and divide by the left-hand figure of the divisor. 1. Divide 627,by 200. MODEL: 3.135 Point off two places. Divide 2)6.27 6.27 by 2. 2. Divide 768 by 3000. MODEL: 256 Point off three places. Divide 3).768 .768 by 3. 3. Divide: 5758 by 2000; 8520 by 2000; 68,960 by 5000. 371. To find 25%, 331%, 66%, etc., of a number, take such a part of the number as the required per cent is of 100%. 1. Find 33% of $7521. MODEL: $2507 331% is of 100% 3)$7521 Take of $7521. 2. Find 371% of $88; 333% of 66; 621% of $64; 75% of $160; 871% of $64. 3. A man bought a farm for $1200. He sold it at a profit of 331%. What was his gain? What was his selling price? 4. $12 is of what number? $12 is 333% more than what number? CHAPTER VI DENOMINATE NUMBERS 372. Denominate units of measure have been established in accordance with law, or custom, to measure values, weight, time, length, surface, capacity, etc. How many dollars are there in a double eagle ? Beginning with the one of least value, name the coins that are in circulation. Beginning with the one of least value, name the bills that are in circulation. How many sheets of paper are there inquire? In 2 quires? Inquire? |