[tex]38 + 27 =65 \\ 41 - 19 = 22 \\ 65 - 22 = 43 \\ \\ \\ \\ 40 \times 2 = 80 \\ 16 = 61 \\ 80 - 61 = 19 \\ \\ 17 - 42 = - 25 \\ - 25 \times 2 = - 50[/tex]
1) (38-8)-(41-16)=
30-25=5
2)40×2=80
80-61=19
3)42-17=25
25×2=50
