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1. Help the courier boy to find the flat number mentioned in the address of the
parcels and mark the flat in the respective building.
Example: Flat 279 is in the 200 Building. Each building block has 100 square boxes
as shown. So, to locate Flat 279, you have to mark the 79th square box in the 200
Building.
Zero Building 100 Building 200 Building 300 Building
(0-99) (100-199) (200-299) (300-399)
90 91 92 93 94 95 96 97 98 99
80 81 82 83 84 85 86 87 88 98
70 71 72 73 74 75 76 77 78 79 279
60 61 62 63 64 65 66 67 68 69
50 51 52 53 54 55 56 57 58 59
40 41 42 43 44 45 46 47 48 49
30 31 32 33 34 35 36 37 38 39
20 21 21 23 24 25 26 27 28 29
10 11 12 13 14 15 16 17 18 19
0 1 2 3 4 5 6 7 8 9
400 Building 500 Building 600 Building 700 Building
(400-499) (500-599) (600-699) (700-799)
800 Building (800-899) 900 Building (900-999)
2. Now locate the square boxes and building blocks for the following:
a. 69 + 100 b. 200 + 160 c. 389 + 100 d. 700 + 83
38 Mathematics 3
