Mental Math Class 5 Worksheet Chapter Roman Numbers

Mental Math Class 5 Worksheet – Roman Numbers

Mental Math Class 5 Worksheet Roman NumbersMental Math Class 5 Worksheet Chapter Number. Here in this page we have given total 25 Questions Set with Solution for Students.

 

(Q1) Write numbers for following Roman numbers.

(i) LXX

Solution:

We know, L à 50 and x = 10

Then L + X + X + X = 50 + 10 + 10 + 10

LXXX = 80

 

(Q2) CD

Solution:

We know, C à 100, D à 500 but C is behind D i.e. subtraction CD = 500 – 100

CD = 400

 

(Q3) XIX

Solution:

We know, x = 10, IX = 9

∴ XIX = 19

 

(Q4) DX

Solution:

We know, D à 500 and x = 10

DX = 500 + 10

DX = 510

 

(Q5) XXVII

Solution:

We know, x = 10, V = 5, I = 1

∴ XXVII = 10 + 10 + 5 + 2 = 27

From Q6 to Q10 find value of questions in numbers.

 

(Q6) XXII + XL

Solution:

We know x = 10, L = 50

∴ XXII = 10 + 10 + 2 = 22

XL = 50 – 10 = 40

∴ XXII + XL = 22 + 40 = 62

 

(Q7) CX – XXX

Solution:

We know, C à 100 and X = 10

CX = 100 + 10 = 110 and XXX = 30

CX – XXX = 110 – 30 = 80

 

(Q8) IX + XX

Solution:

We know, IX = 9 and XX = 20

IX + XX = 9 + 20 = 29

 

(Q9) LXX + V

Solution:

We know, L à 50, V = 5

LXX = 50 + 10 + 10 = 70 and V = 5

LXX + V = 70 + 5 = 75

 

(Q10) C + D + XX

Solution:

We know, C à 100, D = 500, X = 10

C + D + XX = 100 + 500 + 20

C + D + XX = 620

From Q11 to Q20 write given numbers in Roman numerals.

 

(Q11) 35

Solution:

35 = 10 + 10 + 10 + 5

But 10 = x and 5 = V

∴ 35 = XXXV

 

(Q12) 225

Solution:

225 = 100 + 100 + 10 + 10 + 5

= 100 = C and 10 = x also V = 5

∴ 225 = CCXXV

 

(Q13) 960

Solution:

We know, 960 = 900 + 60

900 = 1000 – 100 = CM

60 = LX

∴ 960 = CMLX

 

(Q14) 570

Solution:

We know, 570 = 500 + 50 + 10 + 10

But, D = 500, L = 50, X = 10

∴ 570 = DLXX

 

(Q15) 74

Solution:

We know, 74 = 50 + 10 + 10 + 4

50 = L, 10 = x & 4 = IV

∴ 74 = LXXIV

 

(Q16) 43

Solution:

We know, 43 = 40 + 3

40 = 50 – 10, 50 = L, 10 = X

∴ 40 = XL

Then 3 = III

∴ 43 = XLIII

 

(Q17) 1310

Solution:

We know, 1310 = 1000 + 300 + 10

1000 = M, 300 = CCC & x = 10

1310 = MCCCX

 

(Q18) 2000

Solution:

We know, 2000 = 1000 + 1000

But, 1000 = M

2000 = MM or 2000 = —

 

(Q19) 24

Solution:

We know, 24 = 10 + 10 + 4

x = 10 and IV = 4

∴ 24 = XXIV

 

(Q20) 730

Solution:

We know, 730 = 500 + 100 + 100 + 30

500 = D, 100 = C, 30 = XXX

∴ 730 = DCCXXX

 

(Q21) Find multiplication & then addition L×C+M

 Solution:

We know,

L à 50, C à 100 and M = 1000

∴ L×C = 50×100 = 5000

L×C+M = 5000 + 1000 = 6000 or —

 

(Q22) Which roman numerals subtracted from ‘c’ to get LV?

Solution:

We know, C à 100 also L = 50 and V = 5

∴ LV = 50 + 5 = 55

We make equation

C – x = LV

∴ 100 – x = 55

x = 45 (XLV)

We have to subtract XLV to get value LV

 

(Q23) Find (20×4+50) in Roman numerals.

Solution:

Firstly we solve given equation

(20×4+50)

= 80 + 50 = 130

We write 130 = 100 + 30

We know, 100 = C and 30 = XXX

∴ 130 = CXXX

 

(Q24) Find XXXVI + XL in numbers.

Solution:

We first find numbers.

XXXVI = 10 + 10 + 10 + 5 + 1 = 36

XL = 50 – 10 = 40

XXXVI + XL = 36 + 40 = 76

∴ XXXVI + XL = 76

 

(Q25) Express the value [2000/20] in roman numerals.

Solution:

We first divide the given data.

2000/20 = 20

But, we know, 100 = C

∴ The answer for [2000/20] is 100 i.e. C

Updated: February 3, 2023 — 1:11 pm

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