Read and write lakhs with the Indian comma system, and break big numbers into place values.
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Where the commas go in the Indian system.
One hundred thousand is a big number! In the Indian Number System, we call this special milestone One Lakh.
A lakh is written as a followed by zeroes: 1,00,000.
Worked example: numbers to words, and words to numbers.
Problem. Write the number name for and convert the phrase 'Fifty lakhs five thousand and fifty' into a numeral with proper commas.
Write numbers as words, and words as numbers, with a worked start.
Let's translate large numbers into words and numerals. The number name for 70,53,138 is Seventy lakh fifty three thousand one hundred . To write 'Four lakh seven thousand seven hundred and four' in numbers, we must place commas following the Indian pattern. Placing the digits into their respective periods gives us the numeral .
Break numbers into place values with imaginary calculators.
Imagine you live in the Land of Tens, where calculators are a bit unusual. Instead of normal digit buttons, they only have special addition buttons.
Any number written as a sum of powers of ten.
The digit tells you exactly how many times to press the button for that place value.
This means pressing +1000 five times, +10 seven times, and +1 two times.
Find button presses that make a number on Chitti's calculator.
Problem. Creative Chitti's calculator has buttons for , and so on. What is the smallest number of button clicks needed to get the number on the screen?
