Answers to p.49 to p.53 in the Passport to Mathematics Textbook

 

p.49

 

1. The numbers increase by the consecutive integers 5,6,7,. ;

61,70,80

 

2.  1993; 629 hours;

1994; 622 hours;

1995; 463 hours;

 

3. 

2000

999

651

 

 

4. 8 kinds of sandwiches

 

5. 1990

 

6.  about 9 gallons

 

7.  18 cards;

 Each card is 4 in. wide by 3 in. tall.

The entire poster is 12 in. wide by 18 in. tall.

 

8.  8

 

9.  54

 

10.  53

 

11.  9 + s = 25;

$16

 

12.  What number can you multiply by 8 to get 128?;

16

 

13.  What number can you divide by 3 to get 21;

63

 

14.  what number can you subtract 16 from to get 52;

68

 

15.  First, find the number of seconds in a day and then multiply this number by 365.

 

16.  10 games

 

17.  2160 mm, or 2.16 m

 

18.  3 and 12

 

p.52

 

1. the terms decrease by consecutive odd numbers;

44, 35, 24

 

2. the terms increase by consecutive numbers;

11,16,22

 

3. The numerators are increasing powers of 2;

16/10; 32/10; 64/10

 

4. Each letter is the third letter in the alphabet after the previous letter on the list;

M, P, S

 

5. 18

 

6.  49

 

7.  6

 

8.  5

 

9.  What number can you subtract 45 from to get 110?;

55

 

10.  What number divided by 3 is 14?;

42

 

11.  LT, LK, LM, LP, LY

            TK, TM, TP, TY

                  KM, KP, KY

                        MP, MY

                               PY

15 combinations

 

12. 3 right triangles (1 x 1, 2 x 1, and 2 x 2)

      2 isosceles triangles (2 wide and 2 high, 2 side and 1 high)

 

13.  green

 

14.  6h 25 minutes more

 

15.  54 hours

 

16.  65 hours

 

17.  1995; the total number of hours watching was greater in 1995 than in 1991.

 

p. 53

 

1. C

2. B

3. C

4. C

5. D

6. D

7. D

8. B