Question

a) 16-(-4)•(+3) b) 20+(-5)•(-3) c)12:(-3)-(-5) d) 15-(-10):(-2)

Answer 1

$16 - (-4) . (+3) = \\ 16 - (-12) = \\ 16 + 12 = \\ \fbox{28}$

$20 + (-5) . (-3) = \\ 20 + 15 = \\ \fbox{35}$

$12 : (-3) - (-5) = \\ -4 - (-5) = \\ -4 + 5 = \\ \fbox{1}$

$15 - (-10) : (-2) = \\ 15 - (+5) = \\ 15 - 5 = \\ \fbox{10}$

Answer 2

a) 16-(-4)x(+3) = 
16 +4x3) =
16 + 12 = 
28    

b) 20+(-5)x(-3)=
20-5x-3=
20+15=
35

c) 12:(-3)-(-5)=
-4+5=
1

d) 15-(-10):(-2)=
15+10:-2=
15+(-5)=
15-5=
10