сначала не ПРОВОДЯ ВЫЧИСЛЕНИЙ ПОДЧЕРКНИ(ТЕ)    ТЕ ВЫРАЖЕНИЯ ЗНАЧЕНИЯ КОТОРЫХ ПО СВОЕЙ ПРИКИДКЕ РАНЫ 30 47 60 88 ЗАТЕМ ПРОВЕРЬ ВЫЧЕСЛЕНИЕМ

 

 

   77+7=__

  90-8=__                            90-2=88

                                              50-3=47

                                                                                      55+5=60

                                                                                   27+3=30

 

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