5.7 × 10^7 km + 7.79 x 10^8 km
3 answers
The sum of 5.7 × 10^7 km and 7.79 × 10^8 km is equal to 7.96 × 10^8 km.
1.5 x 10^8 km - 4.5 x 10^9 km
To subtract 4.5 x 10^9 km from 1.5 x 10^8 km, you need to first ensure that the exponents are the same. In this case, both numbers are already expressed in scientific notation with different exponents, so you need to adjust them to be the same.
Step 1: Adjust the exponents:
1.5 x 10^8 km - 4.5 x 10^9 km
= 0.15 x 10^9 km - 4.5 x 10^9 km
Step 2: Subtract the decimal parts:
0.15 x 10^9 km - 4.5 x 10^9 km
= (0.15 - 4.5) x 10^9 km
Step 3: Perform the subtraction:
(0.15 - 4.5) x 10^9 km
= -4.35 x 10^9 km
Therefore, the difference between 1.5 x 10^8 km and 4.5 x 10^9 km is -4.35 x 10^9 km.
Step 1: Adjust the exponents:
1.5 x 10^8 km - 4.5 x 10^9 km
= 0.15 x 10^9 km - 4.5 x 10^9 km
Step 2: Subtract the decimal parts:
0.15 x 10^9 km - 4.5 x 10^9 km
= (0.15 - 4.5) x 10^9 km
Step 3: Perform the subtraction:
(0.15 - 4.5) x 10^9 km
= -4.35 x 10^9 km
Therefore, the difference between 1.5 x 10^8 km and 4.5 x 10^9 km is -4.35 x 10^9 km.