How do you evaluate 89⋅67−15?

1 Answer
Astralboy
May 14, 2017

59105

Explanation:

Solve in order of PEMDAS. Multiply first:

89×67

Break down the numbers into smaller forms so we can see what we can cancel:

2×2×23×3×3×27

We can see that a 3 on the top and bottom cancel and we're left with:

2×2×2×23×7

This evaluates to:

1621

Now we have to subtract:

1621−15

We have to find a common denominator. Multiply 1621 by 55 and multiply 15 by 2121:

(1621)(55)−(15)(2121)

This becomes:

80105−21105

Now we can just subtract the numerators:

80−21=59

So we get:

59105

Related questions
Impact of this question
1048 views around the world
You can reuse this answer
Creative Commons License