To solve the problem of ordering the numbers from least to greatest, let's convert all the numbers to decimals:

1. $\frac{2}{3}$ = $0.6666...$ (approximately 0.67)
2. 2.2 (already a decimal)
3. $\sqrt{4}$ = 2 (since the square root of 4 is 2)
4. $\sqrt{7}$ = approximately 2.64575 (since $\sqrt{7} \approx 2.64575$)
5. 2.3 (already a decimal)

Now, let's list the decimal values:

• $0.67$ (approximation of $\frac{2}{3}$)
• $2.0$ (value of $\sqrt{4}$)
• $2.2$
• $2.3$
• $2.64575$ (approximation of $\sqrt{7}$)

Order from least to greatest:

1. $\frac{2}{3}$ (0.67)
2. $\sqrt{4}$ (2.0)
3. 2.2
4. 2.3
5. $\sqrt{7}$ (2.64575)

So, the correct order is:

$\frac{2}{3}, \sqrt{4}, 2.2, 2.3, \sqrt{7}$

Would you like further details on this solution or any other assistance?

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Related questions:

1. How would you order $\frac{3}{4}$, 1.8, $\sqrt{5}$, 1.9?
2. Can you express $\sqrt{5}$ as a decimal?
3. What is the decimal approximation for $\sqrt{2}$?
4. How do you find the square root of a number without a calculator?
5. What is the decimal form of $\frac{5}{8}$?

Tip: Converting all numbers to a common form, like decimals, helps in easily comparing and ordering them.