Question

3. Write five situations for the following where brackets would be necessary. (a) 7(8 - 3) (b) (7+2) (10-3)​

Answer 1

Answer:

(7+2)(10−3)

[we will open one of the brackets]

7(10−3)+2(10−3)

={(7×10)−(7×3)+{(2×10−2×3)}

={70−21}+{20−6}

=49+14

=63.

Answer 2

(7+2)(10−3)

[we will open one of the brackets]

7(10−3)+2(10−3)

={(7×10)−(7×3)+{(2×10−2×3)}

={70−21}+{20−6}

=49+14

=63.