выпиши в один столбик суммы, а в другой разности. найди их значения.:20+6,93-3,40+8,74-4,30+0,100-60,69-9,30+7,87-7,30-0,60+40,50+9

20+6=26                                     93-3=90

                                                    74-4=70 

                                                      100-60=40

40=8=48                                         69-9=60

30+0=30                                            87-7=80

30+7=37                                      

50+9=59