10 13 16 Subtraction is the process of taking one num ber from another, or of finding the difference What is the sign of subtraction? What is it called? 19 What is the minuend? What is the subtrahend? 14 What is the result of subtraction? 17 12 18 15 11 How is work in subtraction tested? Subtract 2 from each number in the diagram.. Subtract 3; 4; 5; 6; 7; 8; 9. 4; From the numbers in the drill table on page 5, take 2; 6; 8; 1; 3; 5; 7; 9. From 100 take each number in the drill table. Give the difference between 48 and the numbers in the drill table. Between other numbers and the numbers in the drill table. 5. How is the minuend found when the subtrahend and the remainder are given? 6. How is the subtrahend found when the minuend and the remainder are given? 13. From 9000 take 9; 90; 900; 99; 909; 990; 999. 1. The height reached by an aviator is 7912 feet. This is how many feet more than a mile (5280 feet)? 2. Mt. Everest is 29,002 feet high. This is how much more than five miles? The area of the Great Lakes in square miles is: Superior, 31,200; Huron, 23,800; Michigan, 22,450; Erie, 9960; Ontario, 7240. 3. What is the difference in area between Lake Superior and each of the other lakes? 4. How many more square miles in Lake Huron than in Lake Ontario? 5. How many square miles does Lake Michigan lack of being equal in area to Lake Huron? 6. The area of Lake Erie and Lake Ontario together is how many square miles less than the area of Lake Michigan? 7. What is the total area of the Great Lakes? 8. The area of Illinois, 56,665 square miles, is how much greater than the area of New York, 49,204 square miles? 9. How many more than 100,000 square miles is the area of both Illinois and New York? 10. A city has $108,250; how much must it borrow to build a city hall to cost $300,000? 11. The receipts and expenses of five pieces of property for one year were as follows: No. 1, receipts $300, expenses $73.50; No. 2, receipts $450, expenses $126.85; No. 3, receipts $275, expenses $49.47; No. 4, receipts $360, expenses $80.76; No. 5, receipts $540, expenses $137.80. Find (1) the total receipts; (2) the total expenses; (3) the excess of the receipts over the expenses; this is the net income. 12. The total area of Maine, 33,040 square miles, New Hampshire, 9341 square miles, Vermont, 9564 square miles, Massachusetts, 8266 square miles, Rhode Island, 1248 square miles, and Connecticut, 4965 square miles, is how much less than the area of California, 158,297 square miles? Multiplication is the process of combining several equal numbers into one number. What is the sign of multiplication? How is it read? What is the product of: (1) 7 times 6? (2) 7 times 6 men? (3) 7 times $6? 8 2 6 5 1 9 7 3 The product always takes its name from the multiplicand. What does the multiplier always show? What kind of a number must the multiplier always be? Multiply each of the numbers in the diagram by 2; 3; 4; 5; 6; 7; 8; 9; 10; 11; 12. Multiply by 20; 30; 40; 50; 60; 70; 80; 90. 10 60 20 70 50 30 80 40 90 Multiply by 20; 40; 60; 80; 30; 50; 70; 90. Multiply the numbers in the drill table on page 5 by 2; 3; 4; 5; 6; 7; 8; 9. Multiply in this way: 8 times 74 = 8 times 70, + 8 times 4. Think 560, 32, 592. WRITTEN EXERCISES 1. Multiply 56 by 18. 56 18 448 56 1008 Work in this multiplication may be tested in three ways: (1) By multiplying 18 by 56. 56 times 18 = = 1008. Since 1008 is the product of the two factors 18 and 56, 1008 divided by either factor will give the other factor. (2) By dividing 1008 by 18. (3) By dividing 1008 by 56. 1008 ÷ 18 = 56. 1008+ 56 = 18. |