Q.Write each of the following numbers in ordinary decimal form : a. $3.49 \times 10^{-11}$ b. $3.75 \times 10^{-1}$ c. $5.16 \times 10^4$ d. $43.71 \times 10^{-4}$ e. $0.011 \times 10^{-3}$ f. $14.3 \times 10^{-2}$ g. $0.00477 \times 10^5$ h. 5.00858585

a. $3.49 \times 10^{-11}$ — move the decimal 11 places left: 0.0000000000349.

b. $3.75 \times 10^{-1}$ — move 1 place left: 0.375.

c. $5.16 \times 10^4$ — move 4 places right: 51600.

d. $43.71 \times 10^{-4}$ — this is $4.371\times10^{-3}$ in proper form; as an ordinary decimal: 0.004371.

e. $0.011 \times 10^{-3}$ — this is $1.1\times10^{-5}$ in proper form; as an ordinary decimal: 0.000011.

f. $14.3 \times 10^{-2}$ — this is $1.43\times10^{-1}$; as an ordinary decimal: 0.143.

g. $0.00477 \times 10^5$ — this is $4.77\times10^2$; as an ordinary decimal: 477. …

For each value, normalise the coefficient to the 1–10 range first if it is not already, then move the decimal poi …

• Forgetting to renormalise a coefficient that is outside the 1–10 range (as in d, e, f, g) before counting decimal-point shifts. …