Question

[{(46-31)÷5}-4{5+(7-8)}]

Answer 1

Solution :

[(46-31)÷5] - 4{5+(7-8)}

= [ 15/5 ] - 4[ 5 - 1 ]

= 3 - 4 × 4

= 3 - 16

= -13

••••

Answer 2

= [{15÷5}-4{5-1}]
= [3-16]
= -13