How do you solve #( \frac { 2} { 5} + 11) \times ( 10- ( - 3) )#?

Question

615 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2016-10-14T15:50:13

#148 1/5#

#(2/5+11)xx(10-(-3))" "larr# simplify in each bracket first.

=#(11 2/5) xx(10+3)#

=#57/5 xx13/1#

This is now a normal multiplication of #57xx13# and then #div5#

=#741/5#

=#148 1 /5 = 148.2#

BUt maybe there is a method which makes the numbers simpler?

#57/5(10+3)" "larr# use the distributive law.

=#(57xxcancel10^2)/cancel5 + (57xx3)/5#

=#114 +171/5#

=#114 + 34 1/5#

=#148 1/5#

The calculations in the second method involved smaller numbers and are done easily without a calculator.