Page 27 - ICSE Math 5

Review Exercise

1. Write the following numerals in the Hindu-Arabic numeral system.

(a) XVII (b) XLV (c) CDXLIX (d) CCCXCI (e) DLXI
(f) XXIV (g) DCC (h) DCCCI (i) CMXX (j) M

2. Write the following numerals in the Roman numeral system.

(a) 548 (b) 93 (c) 207 (d) 991 (e) 326
(f) 45 (g) 371 (h) 81 (i) 280 (j) 64

3. Find the value of the following. Also, write your answers using Roman numerals.

(a) XCIV – XC (b) CLXXV + CI (c) CCXCIV – CCXLI
(d) D + CC (e) DCCXCIX – DC (f) M – CM

4. Solve the following and write the answer using Roman numerals.
(a) 42 + 50 (b) 7 × 20 (c) 82 × 4 (d) 52 + 60 (e) 9 × 12 (f) 50 × 2

ACTIVITY

What To Do?
To reinforce the concept of Roman numerals
What We Need?

Chalk, pencil and paper
How To Do?
 Form teams of five and name the teams as A, B, C, and so on depending on the number
of teams formed.
 One member from a team will come forward and write a number in the Hindu-Arabic

numeral system on the board.
 The other teams will have to convert that particular number in the Roman numeral
system as fast as they can.
 The first team which converts the given number into the correct Roman number will get
a point.
 Next the other teams will also proceed in the same way.
 At the end, after equal turns of each team, the teacher will count the final points.

 The team which earns the maximum point will be declared the winner.

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