- How much more would 5 33. How much would 2 periscopes
periscopes cost than and 3 pairs of walkie-talkies cost?
2 walkie-talkies? - What is the cost of 4 walkie-
talkies and 6 invisible
ink markers?
Complete the sentences.
Use the words in the box.- Any letter can be used as a.
- The 14 7 is another way to write 21.
- Addition is the? of subtraction.
??Use front-end digits to estimate. Then find the product.- $ .42 12. $ .95 13. $ .79 14. $ .12
8 2 3 5 - $ 8.31 16. $ 7.95 17. $ 4.36 18. $ 8.95
4 9 2 6 - $ 7.50 20. $ 4.31 21. $ 6.08 22. $ 9.49
8 7 5 3 - 4 $ .53 24. 6 $ .87 25. 8 $ .19
- 7 $ 4.03 27. 9 $ 1.71 28. 3 $ 7.47
- 2 $ 9.76 30. 5 $ 5.98 31. 4 $ 6.61
Use the sign on page 140.difference
expression
variable
inverse operation8204-6_140-141 11/29/05 11:46 AM Page 141