SUBTRACT WHOLE NUMBERS PROBLEMS To see the answer, pass your mouse over the colored area.
1. . a) How do we compensate for adding 10 ones to 4 ones? Add 1 ten to 5 tens. 1. . b) Why does that compensate? Because 1 ten is equal to 10 ones. And if we add the same number to both the larger and the smaller, their difference does not change. 1. . b) How do we compensate for adding 10 tens to 2 tens on top? Add 1 hundred to 3 hundreds on the bottom. 1. . b) Why does that compensate? Because 1 hundred is equal to 10 tens. 12. What do we obtain if we add the difference and the smaller number?
The larger number. 1 3. Under what conditions will the difference 1 3. a) be equal to the smaller number? (Consider an example.) When the larger number is twice the smaller number. 1 3. b) be less than the smaller number? (Consider an example.)
When the larger number is less than twice 1 3. c) be more than the smaller number?
When the larger number is more than twice 14. Subtract.
15. Alignment
16. Subtract 6.53 from 22.1. 15.57 17. What number must you add to one thousand nine to get five 5,612 − 1009 = 4,603 18. Richard bought a pen for $1.80, a book for $8.50, and he paid with a 19. Janet paid $1,025 for her car, and she sold it for $1,220. How much 10. At the beginning of a car trip, the odometer read 59,872. At the end 60,135 − 59,872 = 263 miles 11. Your checking account has a balance of $241.73, and you write a Continue on to the next Lesson. or Return to the previous section. Please make a donation to keep TheMathPage online. Copyright © 2001-2007 Lawrence Spector Questions or comments? E-mail: themathpage@nyc.rr.com |