Часть 1 страница 44, ГДЗ по математике за 2 класс к рабочей тетради Моро

\[\begin{aligned} \underset{\mathclap{\textstyle\begin{array}{c} \diagup\hspace{0.7em}\diagdown \\ \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{4}}\kern0.035em}\hspace{-0.04em}\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{0}}\kern0.035em}\hspace{0.7em}\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{5}}\kern0.035em} \end{array}}}{45} + 3 &= \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{4}}\kern0.035em}\hspace{-0.04em}\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{8}}\kern0.035em} & \qquad \underset{\mathclap{\textstyle\begin{array}{c} \diagup\hspace{0.7em}\diagdown \\ \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{4}}\kern0.035em}\hspace{-0.04em}\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{0}}\kern0.035em}\hspace{0.7em}\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{5}}\kern0.035em} \end{array}}}{45} - 3 &= \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{4}}\kern0.035em}\hspace{-0.04em}\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{2}}\kern0.035em} \end{aligned}\] \[\begin{aligned} 40 + (5 + 3) &= \textcolor{#e03131}{\mathbf{48}} & \qquad 40 + (5 - 3) &= \textcolor{#e03131}{\mathbf{42}} \end{aligned}\] 2) Вычисли. \[\begin{aligned} \underset{\mathclap{\textstyle\begin{array}{c} \diagup\hspace{0.7em}\diagdown \\ \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{4}}\kern0.035em}\hspace{-0.04em}\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{0}}\kern0.035em}\hspace{0.7em}\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{5}}\kern0.035em} \end{array}}}{45} + 30 &= \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{7}}\kern0.035em}\hspace{-0.04em}\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{5}}\kern0.035em} & \qquad \underset{\mathclap{\textstyle\begin{array}{c} \diagup\hspace{0.7em}\diagdown \\ \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{4}}\kern0.035em}\hspace{-0.04em}\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{0}}\kern0.035em}\hspace{0.7em}\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{5}}\kern0.035em} \end{array}}}{45} - 30 &= \boxed{\kern0.035em\textcolor{#e03131}{\mathbf{1}}\kern0.035em}\hspace{-0.04em}\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{5}}\kern0.035em} \end{aligned}\] \[\begin{aligned} (40 + \textcolor{#e03131}{\mathbf{30}}) + \textcolor{#e03131}{\mathbf{5}} &= \textcolor{#e03131}{\mathbf{75}} & \qquad (40 - \textcolor{#e03131}{\mathbf{30}}) + \textcolor{#e03131}{\mathbf{5}} &= \textcolor{#e03131}{\mathbf{15}} \end{aligned}\]

В одной коробке было 6 карандашей, а в другой — 12 карандашей. Катя взяла \({\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{5}}\kern0.035em}}\) карандашей. Сколько карандашей осталось в этих двух коробках?
\(1)\ (6 + 12) - 5 = \textcolor{#e03131}{\mathbf{13}}\text{ (к.)}\)
\(2)\ (12 - 5) + 6 = \textcolor{#e03131}{\mathbf{13}}\text{ (к.)}\)
\(3)\ (6 - 5) + 12 = \textcolor{#e03131}{\mathbf{13}}\text{ (к.)}\)
Ответ: \(\textcolor{#e03131}{\mathbf{13}}\) карандашей.