Страница 20, ГДЗ по математике за 2 класс к тренажёру Погореловой

\[\begin{aligned} 54 + 6 &= 50 + (4 + 6) = \textcolor{#e03131}{\mathbf{60}} \\ 37 + 3 &= 30 + (\boxed{\kern0.035em\phantom{\mathbf{0}}\kern0.035em}\hspace{-0.04em}\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{7}}\kern0.035em} + \boxed{\kern0.035em\phantom{\mathbf{0}}\kern0.035em}\hspace{-0.04em}\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{3}}\kern0.035em}) = \textcolor{#e03131}{\mathbf{40}} \\ 82 + 8 &= \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{8}}\kern0.035em}\hspace{-0.04em}\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{0}}\kern0.035em} + (\boxed{\kern0.035em\phantom{\mathbf{0}}\kern0.035em}\hspace{-0.04em}\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{2}}\kern0.035em} + \boxed{\kern0.035em\phantom{\mathbf{0}}\kern0.035em}\hspace{-0.04em}\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{8}}\kern0.035em}) = \textcolor{#e03131}{\mathbf{90}} \\ 45 + 5 &= \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{4}}\kern0.035em}\hspace{-0.04em}\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{0}}\kern0.035em} + (\boxed{\kern0.035em\phantom{\mathbf{0}}\kern0.035em}\hspace{-0.04em}\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{5}}\kern0.035em} + \boxed{\kern0.035em\phantom{\mathbf{0}}\kern0.035em}\hspace{-0.04em}\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{5}}\kern0.035em}) = \textcolor{#e03131}{\mathbf{50}} \\ 66 + 4 &= \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{6}}\kern0.035em}\hspace{-0.04em}\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{0}}\kern0.035em} + (\boxed{\kern0.035em\phantom{\mathbf{0}}\kern0.035em}\hspace{-0.04em}\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{6}}\kern0.035em} + \boxed{\kern0.035em\phantom{\mathbf{0}}\kern0.035em}\hspace{-0.04em}\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{4}}\kern0.035em}) = \textcolor{#e03131}{\mathbf{70}} \\ 78 + 2 &= \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{7}}\kern0.035em}\hspace{-0.04em}\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{0}}\kern0.035em} + (\boxed{\kern0.035em\phantom{\mathbf{0}}\kern0.035em}\hspace{-0.04em}\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{8}}\kern0.035em} + \boxed{\kern0.035em\phantom{\mathbf{0}}\kern0.035em}\hspace{-0.04em}\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{2}}\kern0.035em}) = \textcolor{#e03131}{\mathbf{80}} \\ 29 + 1 &= \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{2}}\kern0.035em}\hspace{-0.04em}\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{0}}\kern0.035em} + (\boxed{\kern0.035em\phantom{\mathbf{0}}\kern0.035em}\hspace{-0.04em}\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{9}}\kern0.035em} + \boxed{\kern0.035em\phantom{\mathbf{0}}\kern0.035em}\hspace{-0.04em}\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{1}}\kern0.035em}) = \textcolor{#e03131}{\mathbf{30}} \\ 18 + 2 &= \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{1}}\kern0.035em}\hspace{-0.04em}\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{0}}\kern0.035em} + (\boxed{\kern0.035em\phantom{\mathbf{0}}\kern0.035em}\hspace{-0.04em}\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{8}}\kern0.035em} + \boxed{\kern0.035em\phantom{\mathbf{0}}\kern0.035em}\hspace{-0.04em}\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{2}}\kern0.035em}) = \textcolor{#e03131}{\mathbf{20}} \end{aligned}\]

\[\begin{aligned} 60 - 4 &= 50 + (10 - 4) = \textcolor{#e03131}{\mathbf{56}} \\ 30 - 7 &= 20 + (\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{1}}\kern0.035em}\hspace{-0.04em}\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{0}}\kern0.035em} - \boxed{\kern0.035em\phantom{\mathbf{0}}\kern0.035em}\hspace{-0.04em}\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{7}}\kern0.035em}) = \textcolor{#e03131}{\mathbf{23}} \\ 90 - 2 &= \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{8}}\kern0.035em}\hspace{-0.04em}\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{0}}\kern0.035em} + (\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{1}}\kern0.035em}\hspace{-0.04em}\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{0}}\kern0.035em} - \boxed{\kern0.035em\phantom{\mathbf{0}}\kern0.035em}\hspace{-0.04em}\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{2}}\kern0.035em}) = \textcolor{#e03131}{\mathbf{88}} \\ 80 - 5 &= \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{7}}\kern0.035em}\hspace{-0.04em}\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{0}}\kern0.035em} + (\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{1}}\kern0.035em}\hspace{-0.04em}\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{0}}\kern0.035em} - \boxed{\kern0.035em\phantom{\mathbf{0}}\kern0.035em}\hspace{-0.04em}\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{5}}\kern0.035em}) = \textcolor{#e03131}{\mathbf{75}} \\ 40 - 9 &= \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{3}}\kern0.035em}\hspace{-0.04em}\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{0}}\kern0.035em} + (\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{1}}\kern0.035em}\hspace{-0.04em}\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{0}}\kern0.035em} - \boxed{\kern0.035em\phantom{\mathbf{0}}\kern0.035em}\hspace{-0.04em}\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{9}}\kern0.035em}) = \textcolor{#e03131}{\mathbf{31}} \\ 20 - 3 &= \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{1}}\kern0.035em}\hspace{-0.04em}\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{0}}\kern0.035em} + (\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{1}}\kern0.035em}\hspace{-0.04em}\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{0}}\kern0.035em} - \boxed{\kern0.035em\phantom{\mathbf{0}}\kern0.035em}\hspace{-0.04em}\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{3}}\kern0.035em}) = \textcolor{#e03131}{\mathbf{17}} \\ 50 - 6 &= \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{4}}\kern0.035em}\hspace{-0.04em}\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{0}}\kern0.035em} + (\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{1}}\kern0.035em}\hspace{-0.04em}\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{0}}\kern0.035em} - \boxed{\kern0.035em\phantom{\mathbf{0}}\kern0.035em}\hspace{-0.04em}\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{6}}\kern0.035em}) = \textcolor{#e03131}{\mathbf{44}} \end{aligned}\]