Let us try to use the above numbers in small sentences. Sentence B is a translation of Sentence A. The words denoting numbers are in bold in all the sentences.
Sentence A: Give me one apple
Sentence B: Mujhe ek seb do. (मुझे एक सेब दो )
Sentence A: There are six oranges in the basket.
Sentence B: Tokri mein chheh santarey hai. ( टोकरी मे छः संतरे हैं )
Sentence A: There are seven days in a week.
Sentence B: Hafte mein saat din hote hai (हफ़्ते मे सात दिन होते है)
Sentence A: Ali Baba and Forty Thieves is an interesting story.
Sentence B: ali baba aur chalees chor ek rochak kahani hai.(अली बाबा और चालीस चोर एक रोचक कहानी है)
Sentence A: My grandmother is ninety years of age.
Sentence B: Meri daadi nabbe saal ki hai. (मेरी दादी नब्बे साल की हैं )
A number like one hundred and twenty five would be ek sau pachis (एक सौ पचीस) in Hindi, one hundred and thirty would be ek sau tees (एक सौ तीस) , one hundred and seventy would be ek sau sattar (एक सौ सत्तर) , two hundred would be do sau (दो सौ), two hundred and eighty would be do sau assee (दो सौ अस्सी) and three hundred would teen sau (तीन सौ). Numbers one hundred and fifty and two hundred and fifty take a different form from the rest. The number one hundred and fifty would be deedh sau (ढेड़ सौ), two hundred and fifty would be adhai sau (अढाई सौ), three hundred and fifty would be sade teen sau (साढे़ तीन सौ), four hundred and fifty would be sade chaar sau (साढे़ चार सौ).
Numbers are required to interpret time too. The article on ‘Hindi Words for Day and Time’ can be read to learn more about this.
Some more Hindi words that can be covered under this topic are:
Dozen: Darzan (दर्ज़न)
Percentage: Pratishat (प्रतीशत)
Division: Vibhag, vibhajan (विभाग, विभाजन)
Multiplication: Gunna (गुना)
Addition: Jama (जमा)
Reference: http://www.hindilearner.com, http://en.wikipedia.org/wiki/Indian_mathematics
A complete list of Hindi words for numbers other words is available for download. An additional list of numbers from twenty to forty is available separately for download.
Subtraction: Ghtav (घटाव)
Tables: Pahade (पहाडे)