Page 457 - Math Smart - 7

Check My Understanding (Pg 341) Check My Understanding (Pg 353)
1. a) 1900 mm' b) 27 000 mm^ 0) 860 000 mm' 1. a) 112 cm'
d) 46 000 cm' e) 150 000 cm^ f) 2 300 000 cm' b) 36 cm' c) 5400 m'
g) 84.6 cm' h) 5 cm^ 1) 0.64 cm' 2. a) 132 m' b) 9600 mm' c) 208 cm'
j) 10 m' k) 35 I) 0.74 m' d) 77 cm' e) 44 080 cm' f) 94 cm'
m) 0.00091 m' n) 0.004881 o) 2.16 m' 3. a) 236 cm' b) 23 600 mm' c) 158cm'
2. a) 11 250 mm' b) 112.5 cm^ c) 450 mm 4. 208 cm'
d) 45 cm 5. 40 m'
3. 1 690 000 cm' Revision (Pg 355)
4. 0.0126 m'
1. a) 5:21 p.m.,17:21 b) 6:19 a.m., 06:19
5. 625 cm' 2. a) 600 b)638 c) 12900 d) 30
6. 7000 cm h) 3.5
e)2880 f)1068 g)2123
1) 10.25
Check My Understanding (Pg 343)
3. a) 1)08:35 ii) 07:25
1.372 cm'
b) 08:10,08:25
2. 50 cm'
c) 07:45
3. a) 6 cm, 3 cm, 34 cm, 52 cm'
d) i) 1 h and 30 min ii) 30 min iii) 35 min
b) 8 cm, 3 cm, 26 cm, 25 cm'
e) 30 min
c) 3 m, 1 m, 26 m, 27 m'
f) 07:50
4. a) 42 cm, 86 cm' b) 38 cm, 70 cm' c) 38 cm, 72 cm'
4. a) 920 000 cm' b) 70 cm' c) 3.5 m'
d) 36 cm, 60 cm'
e) 30 cm, 44 cm' d) 0.15 m' e) 105 mm'
5. a) 1312 mm'b) 13.12 cm'c) 146 mm d) 14.6 cm
f) 76 cm, 132 m'
6. a) 24 m b) 12 m c) 35 m' d) 26 m'
5. Perimeter = 36 cm, 55 cm'
7. a) 70 300 m' b) 88.08 m'
Try and Apply (Pg 344) 8. h = 1 cm, g = 2 cm. Perimeter - 28 cm, Area = 43 cm'
1. Length - 22 cm, Breadth - 16 cm 9. Perimeter - 90 m. Area = 180 m'
10.a)27mm3 b) 288 m' c) 24 cm^
2. 76 cm
d) 616 in' e) 384 mm' f) 253.125 cm'
3. 352 cm'
g) 240 cm' h) 765 cm'
4. 236 cm'
11.1.2
5. 118 000 cm'
6. Yes, the area of 500 small pieces of cardboard is 17.6 m' 12.560
which is enough to cover the 16.7 m' area 13. a) Surface Area = 62 cm', Volume - 30 cm'
b) Surface Area = 61.44 cm'. Volume = 32.768 cm'
Try and Apply (Pg 346) 14. a) 2400 mm b) 12 000 cm' c) 0.72 m'
125 unit cubes d) 5.52 m' e) 5.16 m' f) 3 h and 35 min
Try and Apply (Pg 348)
a) Accept any length, breadth and height that 'when multi Unit 16
plied gives 48 cm^ Recall (Pg 362)
b) This is not possible as 23 Is a prime number thus it is
not possible to form a cuboid with this number of blocks (-1.-1)
Try and Apply (Pg 365)
Check My Understanding (Pg 348)
108°
1. 7 m^
2. 360 cm3 Check My Understanding (Pg 365)
3. 512 cm^ 1.C 2.A 3.8
4. 3000 cm^
5. 616cm3 Check My Understanding (Pg 368)
1. X' (-5,-1), Y' (-3,3), Z' (^,-6)
6. 2744 cm3
7. 4800 cm3 2. W (1,-3), X' (3,-3), Y' (2,-5), Z' (0,-5)
8. 84 cm^ 3. a) E' (-3,1), F' (-1,1), G' (0,0), H' (0,-1), I' (-3,-1)
9. a) 770 m^' b) 60 m= b) M' (3,1), N' (5.0), O' (5,-1), P' (3,-1)
10. 288 cm^ c) P' (-3,1), Q' (-1,2), R' (1,1), S'(0,1), V (0,0), U'
11. 3 cm (-2,0), V (-2,1)
4. a) Move object 5 units to the left and 6 units down.
Check My Understanding (Pg 350) b) Move object 5 units to the left and 6 units up.
1. a = 2, b = 4, c = 4.5, d - 0.5 c) Move object 6 units to the right and 4 units up.
5. a) Rectangle L'M'N'O' is drawn with the coordinates
Recall (Pg 351)
given in the diagram and rectangle UMNO is drawn
a) Square b) Hexagonal Prism
with the coordinates given in part 'b'. Axes are
to be labeled correctly,
Try and Apply (Pg 352)
b) L (2,-1), M (4,-1), N (4,-2), O (2,-2)
1. Correct if the length of the different sides of the cuboid
adds up to the given lengths 6. Q' (-3,10)