Question

evaluate : a) -4+[3(-2)+1+6] b) -18÷[1×9+9×1]​

Answer 1

Answer:

a) -3

b) -1

Step-by-step explanation:

a) -4+[3(-2)+1+6]= -4+[(-6)+1+6]

= -4+1

= -3

b) -18÷[1×9+9×1]= -18÷[9+9]

= -18÷18

= -1

Answer 2

Answer:

a=4

b= -1

Step-by-step explanation:

-4+8=4

-18÷18=-1