Fundamentals of Mathematics, 2008a

149
Solution to Exercise 2.5.36 (p. 129)
2
Solution to Exercise 2.5.38 (p. 129)
none
Solution to Exercise 2.5.40 (p. 129)
none
Solution to Exercise 2.5.42 (p. 130)
1
Solution to Exercise 2.5.44 (p. 130)
(35 + 16) + 7 = 51 + 7 = 58
35 + (16 + 7) = 35 + 23 = 58
Solution to Exercise 2.5.46 (p. 130)
87
Solution to Exercise 2.6.1 (p. 131)
15 · 6 = 90 and 6 · 15 = 90
Solution to Exercise 2.6.2 (p. 131)
432 · 428 = 184, 896 and 428 · 432 = 184, 896
Solution to Exercise 2.6.3 (p. 131)
168
Solution to Exercise 2.6.4 (p. 132)
165,564
Solution to Exercise 2.6.5 (p. 132)
843
Solution to Exercise 2.6.6 (p. 132)
234
Solution to Exercise 2.6.8 (p. 133)
4,032
Solution to Exercise 2.6.10 (p. 133)
326,000
Solution to Exercise 2.6.12 (p. 133)
252
Solution to Exercise 2.6.14 (p. 133)
21,340
Solution to Exercise 2.6.16 (p. 134)
8,316
Solution to Exercise 2.6.18 (p. 134)
32 · 2 = 64 = 4 · 16
Solution to Exercise 2.6.20 (p. 134)
23 · 1, 166 = 26, 818 = 253 · 106
Solution to Exercise 2.6.22 (p. 134)
associative
Solution to Exercise 2.6.24 (p. 134)
7 · 9 = 63 = 9 · 7
Solution to Exercise 2.6.26 (p. 134)
6
Solution to Exercise 2.6.28 (p. 134)
4 + 15 = 19
15 + 4 = 19
Solution to Exercise 2.6.30 (p. 135)
2, 3, 4, 6
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