What is $3\cdot [ - 2 1 \div [ 3 - ( 4 - 8 ) ] \}$ ?

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Answer 1 · 2016-10-15T15:57:13

We work the brackets from the inside out:

$4-8=-4$
$3-(-4)=3+4=7$
$21div7=3$
Now the minus-sign and multiplication:
$3*(-3)=-9$

What is 3\cdot [ - 2 1 \div [ 3 - ( 4 - 8 ) ] \}3\cdot [ - 2 1 \div [ 3 - ( 4 - 8 ) ] \}?