Evaluate. Express your answer in scientific notation.
7, point, 7, 8, times, 10, to the power 6 , minus, 7, point, 0, 3, times, 10, to the power 6
7.78×10 
6
 −7.03×10 
6

To evaluate \( 7.78 \times 10^6 - 7.03 \times 10^6 \):

1. First, subtract the two numbers:
\[
7.78 - 7.03 = 0.75
\]

2. Since both numbers are multiplied by \( 10^6 \), the result will also be multiplied by \( 10^6 \).

Thus, the result is:
\[
0.75 \times 10^6
\]

Now, express this in scientific notation:
\[
0.75 \times 10^6 = 7.5 \times 10^5
\]

So, the final answer is:
\[
7.5 \times 10^5
\]

Would you like more details or have any questions?

Here are 5 related questions for practice:
1. Evaluate \( 5.6 \times 10^4 - 3.4 \times 10^4 \).
2. Simplify \( (8.2 \times 10^7) + (1.9 \times 10^7) \).
3. Express \( 0.0045 \times 10^3 \) in scientific notation.
4. Calculate \( (9.25 \times 10^8) - (4.6 \times 10^8) \).
5. Subtract \( 2.12 \times 10^5 \) from \( 6.78 \times 10^5 \).

**Tip:** When numbers have the same powers of ten, you can simply subtract or add the coefficients and keep the power of ten unchanged!

Evaluate. Express your answer in scientific notation: 7.78 × 10^6 − 7.03 × 10^6

Learn how to evaluate 7.78 × 10^6 − 7.03 × 10^6 and express the result in scientific notation. This problem demonstrates key concepts in working with scientific notation and powers of ten, suitable for students in Grades 6-8.

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