What is #-18 - (-22)#?

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Answer 1 · 2016-04-10T19:44:54

#4#

Recall that multiplying by two #color(red)("negative")# numbers creates a #color(darkorange)("positive")# number.

Note that technically, there is a #color(red)(-1)# in the problem, except we usually emit the #1# since anything multiplied by #1# is that number.

#-18-(-22)#

#=-18# #color(red)(-1)(color(teal)(-22))#

According to B.E.D.M.A.S., always work with brackets first. Thus, multiply #color(red)(-1)# by #color(teal)(-22)#.

#=-18# #color(darkorange)(+22)#

Solve.

#=color(green)(|bar(ul(color(white)(a/a)4color(white)(a/a)|)))#