(18 + 17) (12 + 9) - (7 x 16) (4 + 2)

(18 + 17) (12 + 9) - (7 x 16) (4 + 2) 

by

Your answer

Your name to display (optional):
Privacy: Your email address will only be used for sending these notifications.
Anti-spam verification:
To avoid this verification in future, please log in or register.

1 Answer

18+17=35=7×5;12+9=21=7×3; 7×16=112; 4+2=6. Expression becomes:

35×21-112×6=735-672=63.

Or, you could make the arithmetic easier by breaking down into factors:

72×15-7×16×6=7(7×15-16×6)=(7×3)(7×5-16×2)=(7×3)(35-32)=7×3×3=63.

by Top Rated User (1.2m points)

Related questions

1 answer
11+12+13+14+15+16+17+18+19=100
asked Jul 1, 2014 in Other Math Topics by geethika | 700 views
1 answer
find the sample median 12 12 14 16 17 18 21 21
asked Oct 10, 2012 in Statistics Answers by anonymous | 821 views
0 answers
9=4,21=9,22=9,24=10,8=5,7=5,99=100,100=7,16=?,17=?
asked Jun 26, 2013 in Statistics Answers by anonymous | 887 views
1 answer
12/13 + 16/17
asked May 9, 2013 in Fraction Problems by anonymous | 904 views
1 answer
what is the pattern rule for this pattern 5,10,9,18,17,34,33,66
asked Jan 20, 2014 in Other Math Topics by bobby | 3.6k views
1 answer
find the sum of 18 5/7+ 16 5/9
asked Oct 30, 2012 in least common multiple by anonymous | 571 views
Welcome to MathHomeworkAnswers.org, where students, teachers and math enthusiasts can ask and answer any math question. Get help and answers to any math problem including algebra, trigonometry, geometry, calculus, trigonometry, fractions, solving expression, simplifying expressions and more. Get answers to math questions. Help is always 100% free!

Most popular questions within the last 3000 days

  1. 50+50-25X0+2+2= (19)
  2. it takes 10 road workers 5 days to complete a road repair when working 2 hours a day.Working at the same pace,how many days will it take 2 people working 5 hours a day to finish it? (3)
  3. Solve 15 -1(12÷4+1)? (4)
  4. 8:4(5+2) (3)
  5. How can i represent 1/3; 3/3; 7/3; 10/3 and 15/3 on a number line? (1)

Most popular tags

87,515 questions
100,352 answers
2,420 comments
764,725 users