name the operation that should be done first in each expression 12-3×4 and 7+3(5-2
Mathematics · Middle School · Tue Nov 03 2020
Answered on
Given the numerical expressions:
12-(3)(4) and 7+3(5-2)
Solution:
For the first equation, the values of 4 and 3 should be multiplied first, then their product will be subtracted to 12. It is a general rule that multiplication or division must be done first before addition and subtraction.
= 12-(3)(4)
= 12-12
=0
For the second equation, the values inside the parenthesis should be subtracted first, then their difference will be multiplied by 3. Finally, we can proceed with addition.
=7+3(5-2)
=7+3(3)
=7+9
=16