Åk 6–9
 
English/فارسی

6.4 Calculating with Powers
In this chapter we will see how we calculate and how we use the four arithmetic operators with powers.


Addition

A. 23 + 22 = B. 23 + 32 =
(2 · 2 · 2) + (2 · 2) = (2 · 2 · 2) + (3 · 3) =
8 + 4 = 12 8 + 9 = 17
C. 52 + 32 = D. 52 + 52 =
(5 · 5) + (3 · 3) = (5 · 5) + (5 · 5) =
25 + 9 = 34 25 + 25 = 50


Subtraction

A. 53 - 22 = B. 72 - 25=
(5 · 5 · 5) - (2 · 2) = (7 · 7) - (2 · 2 · 2 · 2 · 2) =
125 - 4 = 121 49 - 32 = 17
C. 34 - 24= D. 53 - 52 =
(3 · 3 · 3 · 3) -
(2
· 2 · 2 · 2) =
(5 · 5 · 5) - (5 · 5) =
81 - 16 = 65 125 - 25 = 100


Multiplication

A. 32 · 34= B. 52 · 32=
(3 · 3) · (3 · 3 · 3 · 3) = (5 · 5) · (3 · 3) =
9 · 81 = 729 25 · 9 = 225


Division

A. 33 ÷ 32= B. 25 ÷ 42=
(3 · 3 · 3) ÷ (3 · 3) = (2 · 2 · 2 · 2 · 2) ÷ (4 · 4) =
27 ÷ 9 = 3 32 ÷ 16 = 2