Страница 29, ГДЗ по математике за 2 класс к тренажёру Погореловой

\[\begin{aligned} 40 + 4 + 20 + 5 &= \textcolor{#e03131}{\mathbf{60}} \textcolor{#e03131}{+} \textcolor{#e03131}{\mathbf{9}} = \textcolor{#e03131}{\mathbf{69}} \\ 90 - 7 - 30 - 2 &= \textcolor{#e03131}{\mathbf{60}} \textcolor{#e03131}{-} \textcolor{#e03131}{\mathbf{9}} = \textcolor{#e03131}{\mathbf{51}} \\ 30 + 6 + 2 + 50 &= \textcolor{#e03131}{\mathbf{80}} \textcolor{#e03131}{+} \textcolor{#e03131}{\mathbf{8}} = \textcolor{#e03131}{\mathbf{88}} \\ 80 - 3 - 6 - 40 &= \textcolor{#e03131}{\mathbf{40}} \textcolor{#e03131}{-} \textcolor{#e03131}{\mathbf{9}} = \textcolor{#e03131}{\mathbf{31}} \\ 50 + 3 + 30 + 4 &= \textcolor{#e03131}{\mathbf{80}} \textcolor{#e03131}{+} \textcolor{#e03131}{\mathbf{7}} = \textcolor{#e03131}{\mathbf{87}} \\ 70 - 4 - 5 - 20 &= \textcolor{#e03131}{\mathbf{50}} \textcolor{#e03131}{-} \textcolor{#e03131}{\mathbf{9}} = \textcolor{#e03131}{\mathbf{41}} \\ 20 + 7 + 2 + 60 &= \textcolor{#e03131}{\mathbf{80}} \textcolor{#e03131}{+} \textcolor{#e03131}{\mathbf{9}} = \textcolor{#e03131}{\mathbf{89}} \\ 60 - 3 - 40 - 4 &= \textcolor{#e03131}{\mathbf{20}} \textcolor{#e03131}{-} \textcolor{#e03131}{\mathbf{7}} = \textcolor{#e03131}{\mathbf{13}} \\ 30 + 4 + 20 + 1 &= \textcolor{#e03131}{\mathbf{50}} \textcolor{#e03131}{+} \textcolor{#e03131}{\mathbf{5}} = \textcolor{#e03131}{\mathbf{55}} \\ 80 - 5 - 30 - 3 &= \textcolor{#e03131}{\mathbf{50}} \textcolor{#e03131}{-} \textcolor{#e03131}{\mathbf{8}} = \textcolor{#e03131}{\mathbf{42}} \end{aligned}\]

\[\begin{aligned} 42 + 25 &= \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{6}}\kern0.035em}\hspace{-0.04em}\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{7}}\kern0.035em}\, \rightarrow & \; \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{6}}\kern0.035em}\hspace{-0.04em}\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{7}}\kern0.035em} - 34 &= \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{3}}\kern0.035em}\hspace{-0.04em}\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{3}}\kern0.035em}\, \swarrow \\ \swarrow\, \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{3}}\kern0.035em}\hspace{-0.04em}\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{3}}\kern0.035em} + 46 &= \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{7}}\kern0.035em}\hspace{-0.04em}\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{9}}\kern0.035em}\, \rightarrow & \; \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{7}}\kern0.035em}\hspace{-0.04em}\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{9}}\kern0.035em} - 25 &= \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{5}}\kern0.035em}\hspace{-0.04em}\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{4}}\kern0.035em}\, \swarrow \\ \swarrow\, \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{5}}\kern0.035em}\hspace{-0.04em}\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{4}}\kern0.035em} - 32 &= \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{2}}\kern0.035em}\hspace{-0.04em}\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{2}}\kern0.035em}\, \rightarrow & \; \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{2}}\kern0.035em}\hspace{-0.04em}\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{2}}\kern0.035em} + 64 &= \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{8}}\kern0.035em}\hspace{-0.04em}\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{6}}\kern0.035em}\, \swarrow \\ \swarrow\, \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{8}}\kern0.035em}\hspace{-0.04em}\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{6}}\kern0.035em} - 53 &= \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{3}}\kern0.035em}\hspace{-0.04em}\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{3}}\kern0.035em}\, \rightarrow & \; \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{3}}\kern0.035em}\hspace{-0.04em}\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{3}}\kern0.035em} + 22 &= \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{5}}\kern0.035em}\hspace{-0.04em}\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{5}}\kern0.035em}\, \swarrow \\ \swarrow\, \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{5}}\kern0.035em}\hspace{-0.04em}\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{5}}\kern0.035em} + 43 &= \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{9}}\kern0.035em}\hspace{-0.04em}\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{8}}\kern0.035em}\, \rightarrow & \; \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{9}}\kern0.035em}\hspace{-0.04em}\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{8}}\kern0.035em} - 67 &= 31 \end{aligned}\]