Страница 28, ГДЗ по математике за 2 класс к тренажёру Погореловой

\[\begin{aligned} (70 + 20) + (3 + 6) &= \textcolor{#e03131}{\mathbf{90}} \textcolor{#e03131}{+} \textcolor{#e03131}{\mathbf{9}} = \textcolor{#e03131}{\mathbf{99}} & \qquad 72 + 16 &= \textcolor{#e03131}{\mathbf{88}} \\ (40 + 50) + (4 + 2) &= \textcolor{#e03131}{\mathbf{90}} \textcolor{#e03131}{+} \textcolor{#e03131}{\mathbf{6}} = \textcolor{#e03131}{\mathbf{96}} & \qquad 43 + 24 &= \textcolor{#e03131}{\mathbf{67}} \\ (70 + 10) + (5 + 1) &= \textcolor{#e03131}{\mathbf{80}} \textcolor{#e03131}{+} \textcolor{#e03131}{\mathbf{6}} = \textcolor{#e03131}{\mathbf{86}} & \qquad 55 + 33 &= \textcolor{#e03131}{\mathbf{88}} \\ (20 + 50) + (7 + 2) &= \textcolor{#e03131}{\mathbf{70}} \textcolor{#e03131}{+} \textcolor{#e03131}{\mathbf{9}} = \textcolor{#e03131}{\mathbf{79}} & \qquad 27 + 62 &= \textcolor{#e03131}{\mathbf{89}} \\ (60 + 30) + (4 + 5) &= \textcolor{#e03131}{\mathbf{90}} \textcolor{#e03131}{+} \textcolor{#e03131}{\mathbf{9}} = \textcolor{#e03131}{\mathbf{99}} & \qquad 31 + 44 &= \textcolor{#e03131}{\mathbf{75}} \\ (80 + 10) + (2 + 3) &= \textcolor{#e03131}{\mathbf{90}} \textcolor{#e03131}{+} \textcolor{#e03131}{\mathbf{5}} = \textcolor{#e03131}{\mathbf{95}} & \qquad 63 + 36 &= \textcolor{#e03131}{\mathbf{99}} \\ (10 + 40) + (6 + 1) &= \textcolor{#e03131}{\mathbf{50}} \textcolor{#e03131}{+} \textcolor{#e03131}{\mathbf{7}} = \textcolor{#e03131}{\mathbf{57}} & \qquad 45 + 51 &= \textcolor{#e03131}{\mathbf{96}} \\ (50 + 30) + (5 + 3) &= \textcolor{#e03131}{\mathbf{80}} \textcolor{#e03131}{+} \textcolor{#e03131}{\mathbf{8}} = \textcolor{#e03131}{\mathbf{88}} & \qquad 24 + 35 &= \textcolor{#e03131}{\mathbf{59}} \end{aligned}\]

\[\begin{aligned} (40 - 20) + (7 - 4) &= \textcolor{#e03131}{\mathbf{20}} \textcolor{#e03131}{+} \textcolor{#e03131}{\mathbf{3}} = \textcolor{#e03131}{\mathbf{23}} & \qquad 43 - 11 &= \textcolor{#e03131}{\mathbf{32}} \\ (90 - 30) + (5 - 3) &= \textcolor{#e03131}{\mathbf{60}} \textcolor{#e03131}{+} \textcolor{#e03131}{\mathbf{2}} = \textcolor{#e03131}{\mathbf{62}} & \qquad 87 - 24 &= \textcolor{#e03131}{\mathbf{63}} \\ (50 - 40) + (3 - 1) &= \textcolor{#e03131}{\mathbf{10}} \textcolor{#e03131}{+} \textcolor{#e03131}{\mathbf{2}} = \textcolor{#e03131}{\mathbf{12}} & \qquad 59 - 46 &= \textcolor{#e03131}{\mathbf{13}} \\ (20 - 10) + (8 - 6) &= \textcolor{#e03131}{\mathbf{10}} \textcolor{#e03131}{+} \textcolor{#e03131}{\mathbf{2}} = \textcolor{#e03131}{\mathbf{12}} & \qquad 25 - 14 &= \textcolor{#e03131}{\mathbf{11}} \\ (80 - 50) + (6 - 2) &= \textcolor{#e03131}{\mathbf{30}} \textcolor{#e03131}{+} \textcolor{#e03131}{\mathbf{4}} = \textcolor{#e03131}{\mathbf{34}} & \qquad 77 - 56 &= \textcolor{#e03131}{\mathbf{21}} \\ (60 - 30) + (4 - 3) &= \textcolor{#e03131}{\mathbf{30}} \textcolor{#e03131}{+} \textcolor{#e03131}{\mathbf{1}} = \textcolor{#e03131}{\mathbf{31}} & \qquad 38 - 25 &= \textcolor{#e03131}{\mathbf{13}} \\ (30 - 20) + (9 - 7) &= \textcolor{#e03131}{\mathbf{10}} \textcolor{#e03131}{+} \textcolor{#e03131}{\mathbf{2}} = \textcolor{#e03131}{\mathbf{12}} & \qquad 66 - 33 &= \textcolor{#e03131}{\mathbf{33}} \end{aligned}\]