Question

1. Simplify.

5~2+20



a 5


b 30


c 45


d 72




2. Evaluate.


8−2⋅3+7 =


3. Simplify.


6~2+3~2



a 9


b 18


c 45


d 81



4. Simplify.


2~3+4⋅8



a 40


b 80


c 96


d 160



5. Evaluate the expression.


3~2−2⋅3+5 =

Answer 1

1. The "required option c) 45" is correct.

2. The value of 8 − 2⋅3 + 7 = 9

3. The required "option c) 45" is correct.

4. The required "option a) 40" is correct.

5. The value of
`3^2-2.3+5` = 8

Explanation:

1. We have,

`5^2` + 20

To find, the value of
`5^2` + 20 = ?

∴
`5^2` + 20

= 5 × 5 + 20

= 25 + 20

= 45

Thus, the "required option c) 45" is correct.

2. We have,

8 − 2⋅3 + 7

To find, the value of 8 − 2⋅3 + 7 = ?

∴ 8 − 2⋅3 + 7

= 8 - 6 + 7

= 15 - 6

= 9

Thus, the value of 8 − 2⋅3 + 7 = 9

3. We have,

`6^2+3^2`

To find, the value of
`6^2+3^2` = ?

∴
`6^2+3^2`

= 6 × 6 + 3 × 3

= 36 + 9

= 45

Thus, the required "option c) 45" is correct.

4. We have,

`2^(3) +4.8`

To find, the value of
`2^(3) +4.8` = ?

∴
`2^(3) +4.8`

= 2 × 2 × 2 + 4 × 8

= 8 + 32

= 40

Thus, the value of
`2^(3) +4.8` = 40

Thus, the required "option a) 40" is correct.

5 . We have,

`3^2-2.3+5`

To find, the value of
`3^2-2.3+5` = ?

∴
`3^2-2.3+5`

= 3 × 3 - 2 × 3 + 5

= 9 - 6 + 5

= 14 - 6

= 8

Thus, the value of
`3^2-2.3+5` = 8