50 or 100 y in a d (50 or 100 years in a decade)
100 years war
100 Years' War
Seven dog years to every human year.
404
Presumably you mean in Roman numerals in which case they stand for 1000, 500 and 100 respectively.
4 quarters in a dollar
5*100 = 500 c+c+c+c+c = D
Let x = abc be a 3-digit number. The expanded for of x is 100*a + 10*b + c.And let y = de = 10*d + e be a 2-digit number. Then x*y = 1000*a*d + 100*a*e + 100*b*d + 10*b*e + 10*c*d + c*e = 1000*a*d + 100*(a*e + b*d) + 10*(b*e + c*d) + c*e.
If you count A = 1, B = 2, C = 3 etc, then W+E+D+N+E+S+D+A+Y = 100
Study Sleep Talking Unlimited texting Dreaming Yawning
L=50 c=100 d=500 m=1000