Arrange the following numbers in ascending order:
1.7×105, −1.8×105, 1.7×1010
−1.8×105, 1.7×105, 1.7×1010
We know that negative numbers are always less than the positive numbers. So, −1.8×105 is the least number among the given numbers
1.7×105=1.7×100000=170000
1.7×1010=1.7×10000000000=17000000000
∴1.7×105<1.7×1010
The ascending order: −1.8×105<1.7×105<1.7×1010