Expression 8

Evaluate this expressions:

a) 5[3 + 4(2.8 - 3)]
b) 5×(8-4)÷4-2

Correct result:

a =  11
b =  3

Solution:

$a=5\cdot (3+4\cdot (2.8-3))=11$

$b=5\cdot (8-4)\mathrm{/}4-2=3$

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