Question 1: Calculate the value of (3.2 × 10^4) + (4.8 × 10^3).

Answer: 36800

Question 2: Subtract (2.5 × 10^6) - (1.3 × 10^6).

Answer: 1.2 × 10^6

Question 3: Express the sum of 1.5 × 10^3 and 2.3 × 10^4 in standard form.

Answer: 2.45 × 10^4

Question 4: In standard form, find the result of (6.4 × 10^5) - (2.1 × 10^4).

Answer: 6.19 × 10^5

Question 5: A scientist measures a quantity as 4.2 × 10^8 units. Another measurement is 1.5 × 10^8 units. Find the difference in standard form.

Answer: 2.7 × 10^8

Question 6: A company reports an increase of 3.6 × 10^7 in sales last year, and a decrease of 1.2 × 10^7 this year. What is the net change in sales?

Answer: 2.4 × 10^7

Question 7: Construct a triangle with sides of lengths 3.5 × 10^3, 4.2 × 10^3, and their sum.

Answer: 7.7 × 10^3

Question 8: A block has a mass of 2.4 × 10^2 kg. An additional mass of 1.8 × 10^2 kg is added. Find the total mass.

Answer: 4.2 × 10^2

Question 9: Two distances are measured as 5.6 × 10^4 m and 2.3 × 10^4 m. Find their sum in standard form.

Answer: 7.9 × 10^4

Question 10: Add 7.2 × 10^5 and 3.8 × 10^4 in standard form.

Answer: 7.58 × 10^5

Question 11: A researcher records a value as 9.8 × 10^6 and later updates it to 1.05 × 10^7. Calculate the change in the measurement.

Answer: 2.7 × 10^6

Question 12: Identify and correct the error in the calculation: (4.5 × 10^4) + (2.3 × 10^4) = 6.8 × 10^4.

Answer: Incorrect, the correct sum is 6.8 × 10^4, which is correct; the error would be in a different calculation.