Страница 64, ГДЗ по математике за 4 класс к тренажёру Конновой

\[\begin{aligned} 348 : y &= 678 - 674 \\ 348 : y &= \textcolor{#e03131}{\mathbf{4}} \\ y &= 348 : 4 \\ y &= \textcolor{#e03131}{\mathbf{87}} \end{aligned}\] \[\begin{array}{l|l} \mathllap{\smash{\raisebox{-0.5em}{$-$}}\,}\overset{\mathclap{\textcolor{#1c7ed6}{\frown}}}{34}8 & \underline{\,4\phantom{0}\,} \\ \underline{32}\phantom{0} & \overset{\textcolor{#1c7ed6}{\bullet}}{\textcolor{#e03131}{\mathbf{8}\kern-0.075em}}\overset{\textcolor{#1c7ed6}{\bullet}}{\textcolor{#e03131}{\mathbf{7}\kern-0.075em}} \\ \phantom{0}\mathllap{\smash{\raisebox{-0.5em}{$-$}}\,}28 & \\ \phantom{0}\underline{28} & \\ \phantom{00}0 & \end{array}\] \[\begin{aligned} c \cdot 68 &= 17 \cdot 4 \\ c \cdot 68 &= \textcolor{#e03131}{\mathbf{68}} \\ c &= 68 : 68 \\ c &= \textcolor{#e03131}{\mathbf{1}} \end{aligned}\] \[\begin{aligned} (403 - 69) : a &= 167 \\ \textcolor{#e03131}{\mathbf{334}} : a &= 167 \\ a &= 334 : 167 \\ a &= \textcolor{#e03131}{\mathbf{2}} \end{aligned}\] \[\begin{array}{cr} & \vphantom{\overset{\bullet}{0}}\overset{\textcolor{#1c7ed6}{\bullet}}{\textcolor{#1c7ed6}{4}}\overset{\textcolor{#1c7ed6}{\bullet}}{\textcolor{#1c7ed6}{0}}3 \\ \smash{\raisebox{0.62em}{$-$}} & 69 \\ \hline & \textcolor{#e03131}{\mathbf{3}\kern-0.075em\mathbf{3}\kern-0.075em\mathbf{4}\kern-0.075em} \end{array} \qquad \begin{array}{l|l} \mathllap{\smash{\raisebox{-0.5em}{$-$}}\,}\overset{\mathclap{\textcolor{#1c7ed6}{\overgroup{\hphantom{\textstyle 334}}}}}{334} & \underline{\,167\,} \\ \underline{334} & \overset{\textcolor{#1c7ed6}{\bullet}}{\textcolor{#e03131}{\mathbf{2}\kern-0.075em}} \\ \phantom{00}0 & \end{array}\] \[\begin{aligned} 5\,415 - b &= 4\,309 - 2\,180 \\ 5\,415 - b &= \textcolor{#e03131}{\mathbf{2\,129}} \\ b &= 5\,415 - 2\,129 \\ b &= \textcolor{#e03131}{\mathbf{3\,286}} \end{aligned}\] \[\begin{array}{cr} & \vphantom{\overset{\bullet}{0}}4\overset{\textcolor{#1c7ed6}{\bullet}}{\textcolor{#1c7ed6}{3}}09 \\ \smash{\raisebox{0.62em}{$-$}} & 2180 \\ \hline & \textcolor{#e03131}{\mathbf{2}\kern-0.075em\mathbf{1}\kern-0.075em\mathbf{2}\kern-0.075em\mathbf{9}\kern-0.075em} \end{array} \qquad \begin{array}{cr} & \vphantom{\overset{\bullet}{0}}5\overset{\textcolor{#1c7ed6}{\bullet}}{\textcolor{#1c7ed6}{4}}\overset{\textcolor{#1c7ed6}{\bullet}}{\textcolor{#1c7ed6}{1}}5 \\ \smash{\raisebox{0.62em}{$-$}} & 2129 \\ \hline & \textcolor{#e03131}{\mathbf{3}\kern-0.075em\mathbf{2}\kern-0.075em\mathbf{8}\kern-0.075em\mathbf{6}\kern-0.075em} \end{array}\]