Write the names accordingly to International system of numeration:

(a) [78921092]

(b) [7452283]

(c) [99985102]

(d) [48049831]

When it comes to naming numbers according to the International System of Numeration, we break down the numbers into groups of three digits, starting from the right. Each group has a specific name based on its position. Let’s go through each of your examples step by step.

Understanding the International System of Numeration

The International System of Numeration uses specific terms for large numbers. Here’s a quick overview of the names for each group:

• Units (1-999)
• Thousands (1,000-999,999)
• Millions (1,000,000-999,999,999)
• Billion (1,000,000,000-999,999,999,999)
• Trillion (1,000,000,000,000 and above)

Breaking Down the Numbers

(a) 78921092

To name 78,921,092, we start from the right:

• 092 - Ninety-two (units)
• 921 - Nine hundred twenty-one (thousands)
• 78 - Seventy-eight (millions)

Putting it all together, we say: Seventy-eight million, nine hundred twenty-one thousand, ninety-two.

(b) 7452283

For 7,452,283, we break it down as follows:

• 283 - Two hundred eighty-three (units)
• 452 - Four hundred fifty-two (thousands)
• 7 - Seven (millions)

The complete name is: Seven million, four hundred fifty-two thousand, two hundred eighty-three.

(c) 99985102

Next, we analyze 99,985,102:

• 102 - One hundred two (units)
• 985 - Nine hundred eighty-five (thousands)
• 99 - Ninety-nine (millions)

This number is named: Ninety-nine million, nine hundred eighty-five thousand, one hundred two.

(d) 48049831

Finally, for 48,049,831:

• 831 - Eight hundred thirty-one (units)
• 049 - Forty-nine (thousands)
• 48 - Forty-eight (millions)

Thus, we say: Forty-eight million, forty-nine thousand, eight hundred thirty-one.

Recap of the Names

Here’s a quick summary of the names for each number:

• (a) 78,921,092 - Seventy-eight million, nine hundred twenty-one thousand, ninety-two
• (b) 7,452,283 - Seven million, four hundred fifty-two thousand, two hundred eighty-three
• (c) 99,985,102 - Ninety-nine million, nine hundred eighty-five thousand, one hundred two
• (d) 48,049,831 - Forty-eight million, forty-nine thousand, eight hundred thirty-one

By following this method, you can accurately name any number according to the International System of Numeration. If you have more numbers or need further clarification, feel free to ask!