How do you evaluate $15 \div (- 3) - (- 2) + 2.3 (- 2.1)$ $15 \div (-3) - (-2) + 2.3 (-2.1)$ ?

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Answer 1 · 2017-10-06T01:26:38

Use BEDMAS/PEMDAS.

All we are doing is applying BEDMAS/PEMDAS laws to this expression.

$15 \div (~ 3) - (~ 2) + 2.3 (~ 2.1)$ $15 div (~3) - (~2)+2.3(~2.1)$

BEDMAS says we do brackets first. Well the brackets are just terms so nothing we can do there.

There are no exponents so we do division/multiplication first.

We can divide the $15$ $15$ by $~ 3$ $~3$ as well as multiply $2.3$ $2.3$ by $~ 2.1$ $~2.1$ .

$= ~ 5 - (~ 2) - 4.83$ $=~5 - (~2)-4.83$

Now we just add/subtract the remaining terms.

$= ~ 3 - 4.83$ $=~3-4.83$

$= ~ 7.83$ $=~7.83$

There we go! If we evaluate the expression, we get $~ 7.83$ $~7.83$ .

Hope this helps :)

How do you evaluate 15÷(−3)−(−2)+2.3(−2.1)15 \div (-3) - (-2) + 2.3 (-2.1)?