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Here is a transcription of the exercises from the image:

### Section 6: Solve without using a calculator

a.  
\[
7.2 + 6^2 - \sqrt{64} - 12
\]

b.  
\[
\frac{\sqrt{100} - \sqrt{81} + \sqrt{64}}{32 + 4^2}
\]

c.  
\[
6 - \sqrt{25} - \sqrt{1}
\]

d.  
\[
\frac{4 - 3^2 - \sqrt{4}}{\sqrt{3^3} - 2 \cdot 3 - 2.7}
\]

e.  
\[
\frac{4.3 + 72 - 2^4}{5^2}
\]

### Section 7: Solve using a calculator

a.  
\[
0.5 \cdot 27 + 1.9 \cdot 34
\]

b.  
\[
5.2 \cdot 95 - 15.6 \cdot 24
\]

c.  
\[
1687.07 + 1029.2 - 21.58
\]

d.  
\[
9.999 \cdot 25 + 2678 + 416
\]

e.  
\[
\frac{(712 + 963)}{25} - 43.816
\]

f.  
\[
3.2 - \sqrt{123.21}
\]

g.  
\[
\frac{\sqrt{702 + 17}}{6}
\]

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A series of mathematical expressions involving square roots, powers, and arithmetic operations, some of which require calculator use.

Solve a variety of math problems involving square roots, powers, and arithmetic operations without using a calculator. Practice includes problems with square roots, powers of numbers, and various operations. Suitable for students in Grades 8-10.

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