Write five situations for the following where brackets would benecessa

1.	Write five situations for the following where brackets would benecessary. (a) 7(8-3)b) (7 +2) (10-3)
Answer» a) 7(8-3)[ when we will open bracket 8 and 3 will be multiplied by 7] = (7×8) - ( 7×3) = 56 - 21 = 35 Direct Method , solve the bracket first - 7(8-3)= 7×5= 35 b) (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 Direct Method , solve the brackets - (7+2) (10-3)= 9 × 7= 63

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

Answer»

a) 7(8-3)[ when we will open bracket 8 and 3 will be multiplied by 7]

= (7×8) - ( 7×3)

= 56 - 21

= 35

Direct Method , solve the bracket first -

7(8-3)= 7×5= 35

b) (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

Direct Method , solve the brackets -

(7+2) (10-3)= 9 × 7= 63