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Unformatted text preview: hen we multiply by 7, we are really multiplying by 70 and therefore leave a 0 at the extreme right before we proceed with the multiplication. Example: 537 × 72 1074 + 37590 38664 If we multiply by a threedigit number, we leave one zero on the right when multiplying by the tens digit and two zeros on the right when multiplying by the hundreds digit. Example: 372 × 461 372 22320 + 148800 171492 Exercise 3
Find the following products. 1. 526 multiplied by 317 (A) 156,742 (B) 165,742 (C) 166,742 (D) 166,748 (E) 166,708 8347 multiplied by 62 (A) 517,514 (B) 517,414 (C) 517,504 (D) 517,114 (E) 617,114 705 multiplied by 89 (A) 11,985 (B) 52,745 (C) 62,705 (D) 62,745 (E) 15,121 4. 437 multiplied by 607 (A) 265,259 (B) 265,219 (C) 265,359 (D) 265,059 (E) 262,059 798 multiplied by 450 (A) 358,600 (B) 359,100 (C) 71,820 (D) 358,100 (E) 360,820 5. 2. 3. www.petersons.com Operations with Whole Numbers and Decimals 5 4. DIVISION OF WHOLE NUMBERS
The number being divided is called the dividend. The number we are dividing by is called the divisor. The answer to the division is called the quotient. When we divide 18 by 6, 18 is the dividend, 6 is the divisor, and 3 is the quotient. If the quotient is not an integer, we have a remainder. The remainder when 20 is divided by 6 is 2, 2 because 6 will divide 18 evenly, leaving a remainder of 2. The quotient in this case is 6 6 . Remember that in writing the fractional part of a quotient involving a remainder, the remainder becomes the numerator and the divisor the denominator. When dividing by a singledigit divisor, no long division procedures are needed. Simply carry the remainder of each step over to the next digit and continue. Example: 9724 6 5 84 31 4 2 4 ) Exercise 4
1. Divide 391 by 23. (A) 170 (B) 16 (C) 17 (D) 18 (E) 180 Divide 49,523,436 by 9. (A) 5,502,605 (B) 5,502,514 (C) 5,502,604 (D) 5,502,614 (E) 5,502,603 3. Find the remainder when 4832 is divided by 15. (A) 1 (B) 2 (C) 3 (D) 4 (E) 5 Divide 42,098 by 7. (A) 6014 (B) 6015 (C) 6019 (D) 6011 (E) 6010 Which of the following is the quotient of 333,180 and 617? (A) 541 (B) 5...
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 Spring '10
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