C1a
Practice - Basic Arithmetic
TRY TO ANSWER IN TWO AND A HALF MINUTES,
QUESTIONS
QUESTIONS
1. Multiply 3 (4 x 5). Divide 16 into 6432.
2. Multiply 311 times 42.
3. The temperature drops from 55 degrees at 1 pm to -4 degrees that night. How much did the temperature drop?
4. You buy something which costs $5.78, paying with a $20 bill. How much change do you expect?
5. A container holds 7 servings. A serving is 12 ounces. How many ounces does the container hold?
6. You bought a car two years ago with 18,450 miles on its odometer. Now it reads 42,240 miles. How many miles have you driven in the past two years?
7. 18 refrigerators arrive at your store. Each refrigerator costs $295. What is the total cost of the shipment?
8. Add 75.45 and 4.7.
9. Divide 81.2 by 7.54.
ANSWERS
1. 3 x (4 x 5) = 3 x 20 = 60. Use long division to divide 16 into 6432. The answer is 402.
2. 13,062
3. 55 - (-4) = 55 + 4 = 59 degrees.
4. 20.00 minus 5.78 = 14.22. $14.22.
5. 12 ounces/serving x 7 servings = 84 ounces.
6. 42,240 minus 18,450 = 23,790 miles.
7. 18 times $295 = $5,310.
8. 75.45 + 4.70 = 80.15.
9. 81/2 / 7.54 = 10.76923.
CALCULATOR STEPS
1a. Press on. Press clear. Key in 3. Press x. Key in 4. Press x. Key in 5. Press enter. The screen should show "60".
1b. Press on. Press clear. Key in 6432. Press ÷. Key in 16. Press enter. The screen should show "402".
2. Press on. Press clear. Key in 311. Press x. Key in 42. Press enter. The screen should show "13062".
3. Press on. Press clear. Key in 3. Press + . Key in 5. Press the minus sign - . Key in 2. Press the minus sign - . Key in 3. Press enter. The screen should show "3".
4. Press on. Press clear. Key in 20. Press - . Key in 5. Key in the decimal point . . Key in 78. Press enter. The screen should show "14.22". (Note: You do not have to enter "20.00." When you enter "20" the calculator assumes the decimal point and the zeros after it automatically.)
5. Press on. Press clear. Key in 7. Press x. Key in 12. Press enter. The screen should show "84".
6. Press on and clear. Key in 42240. Press - . Key in 18450. Press enter. Press ÷. Key in 2. Press enter. The first screen should show "23790". After division by 2, the screen should show "11895". (Note: You do not have to re-enter the first answer before dividing by 2. Just divide and the calculator will know to use the first answer.)
7. Press on and clear. Key in 18. Press x. Key in 295. Press enter. The screen should show "5310".
8. Press on and clear. Key in 75.45. Press + . Key in 4.7. Press enter. The screen should show "80.15".
9. Press on and clear. Key in 81.2. Press ÷ . Key in 7.54. Press enter. The screen should show "10.76923".