Name
Write each in expanded form.
4. 0.86 1 0.683
0.9 1 0.07 5 1.6;
0.8 1 0.06 5 1.4
5. 785.53 243.752
1 451.385
800 1 200 1 500 5 1500;
700 1 200 1 400 5 1300
Find the sum or difference.
7. n 1 0.05, when n 5 0.65 0.7
Copyright © by William H. Sadlier, Inc. Permission to duplicate classroom quantities granted to users of Progress in Mathematics.
1. 347.046
2. 5.902
3. 0.593
300 1 40 1 7 1 0.04 1 0.006
5 1 0.9 1 0.002
0.5 1 0.09 1 0.003
Estimate by both rounding and front-end estimation.
Between what two numbers will the exact sum be? between the two estimates
6. 2.07
8.5
1 6.229
2 1 9 1 6 5 17;
2 1 8 1 6 5 16
8. n 2 0.03, when n 5 0.49 0.46
Add or subtract. Use any method.
9. 0.516 10. 6.8 1 0.47
1 0.72
0.986
7.52
13. 1.23 1 3.517 1 12.3 17.047
15. 6.85 2 2.4 4.45
11. 0.595 12. 12.79
2 0.41
2 3.581
0.185
9.209
14. 153.236 1 98.2 1 5.34 256.776
16.
354.9 2 98.183 256.717
Check students’
explanations.
18.Betty has 3 pieces of fabric
measuring 0.45 m, 0.24 m, and
0.3 m. Is the total length more or
less than one meter? Explain.
0.45 1 0.24 1 0.3 5 0.99; 0.99 m;
0.99 m , 1 m; less than
Use a strategy you have learned.
17.Pam needs 2 yd of blue ribbon. She
has 0.497 yd. She buys 0.91 yd more.
Then she buys 0.4 yd of red ribbon.
How much more blue ribbon does
Pam need? 0.497 1 0.91 5 1.407;
2 2 1.407 5 0.593; Pam needs 0.593 yd more
blue ribbon.
Use the number line.
X
19. Name the decimals for points X and V. X 5 19.092
V 5 19.099
19.09
V
19.1
Draw a number line and locate each point.
20. S  19.04721. T  19.03422. D  19.04
21.–22. T
19.03
D
19.04
S
19.05
Grade 5, Chapter 8
1