Big Ideas Math: Modeling Real Life, Grade 8
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5. Estimating Quantities
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Exercise 2 Page 344

Round the given number to the nearest 100 000 000 000.

1* 10^(11)

Practice makes perfect
We want to round the given number and write the result as the product of a single digit and a power of 10. 98 247 836 218Let's start by rounding the given number to the nearest 100 000 000 000. Since the digit in the billions place is greater than 5, we will modify the digit in the ten-billions place. 9 8 247 836 218 ≈ 100 000 000 000 Finally we will write the above number as the product of a single digit and a power of 10.
100 000 000 000
1* 100 000 000 000
1* 10^(11)