Розділ 3. Множення і ділення на двоцифрове число » 486

x – 150 = 450 х = 450 + 150 х = 600_______ 600 – 150 = 450 450 = 450 x + 150 = 450 х = 450 – 150 х = 300_______ 300 + 150 = 450 450 = 450 x + (150 – 100) = 450 х + 50 = 450 х = 450 – 50 х = 400_____________ 400 + (150 – 100) = 450 400 + 50 = 450 450 = 450 152 : x = 4 х = 152 : 4 х = 38_____ 152 : 38 = 4 4 = 4 152 – x = 4 х = 152 – 4 х = 148_____ 152 – 148 = 4 4 = 4 (152 + 18) – x = 4 170 – х = 4 х = 170 – 4 х = 166______ 170 – 166 = 4 4 = 4 26 + x = 130 х = 130 – 26 х = 104______ 26 + 104 = 130 130 = 130 26 ● x = 130 х = 130 : 26 х = 5______ 26 ● 5 = 130 130 = 130 (26 – 16) ● x = 130 10 ● x = 130 х = 130 : 10 х = 13______ 10 ● 13 = 130 130 = 130