ГДЗ по математике 3 класс Петерсон рабочая тетрадь Часть 1, 2, 3 Часть 1 | Страница 46

\[\boxed{\mathbf{Страница\ 46.\ }\mathbf{Еуроки\ - \ ДЗ\ без\ мороки}}\]

\[\boxed{\mathbf{1.\ }}\]

\[\mathbf{а)\ a}\mathbf{+}^{\mathbf{4}}\mathbf{b}\mathbf{\cdot}^{\mathbf{2}}\mathbf{\text{c\ }}\mathbf{:}^{\mathbf{3}}\left( \mathbf{d}\mathbf{-}^{\mathbf{1}}\mathbf{m} \right)\mathbf{+}^{\mathbf{5}}\mathbf{k}\]

\[\mathbf{б)\ }\mathbf{\text{c\ }}\mathbf{:}^{\mathbf{3}}\mathbf{a}\mathbf{\cdot}^{\mathbf{4}}\left( \mathbf{m}\mathbf{+}^{\mathbf{1}}\mathbf{n} \right)\mathbf{-}^{\mathbf{6}}\mathbf{\text{b\ }}\mathbf{:}^{\mathbf{5}}\mathbf{(d}\mathbf{\cdot}^{\mathbf{2}}\mathbf{k)}\mathbf{\ }\]

\[\boxed{\mathbf{2.\ }}\]

\[\textbf{а)}\ 200\ 000 +^{2}\left( 2050 -^{1}693 \right) +^{3}3792 =\]

\[= 25\ 149\]

\[\boxed{\mathbf{3.\ }}\]

\[a + b = b + a\]

\[(a + b) + c = a + (b + c)\]

\[(a + b) - c = (a - c) + b\]

\[a - (b + c) = a - b - c\]

\[\textbf{а)}\ (63 + 52) + 48 + (37 + 200) =\]

\[= (63 + 37) + (52 + 48) + 200 =\]

\[= 100 + 100 + 200 = 400\]

\[\textbf{б)}\ 3571 + (429 + 25\ 068) + 4932 =\]

\[= (3571 + 429) + (25\ 068 + 4\ 932) =\]

\[= 4000 + 30\ 000 = 34\ 000\]

\[\textbf{в)}\ (29\ 815 + 236) - 28\ 815 =\]

\[= (29\ 815 - 28\ 815) + 236 =\]

\[= 1000 + 236 = 1236\ \]

\[\textbf{г)}\ 10\ 000 - 8504 - 496 =\]

\[= 10\ 000 - (8504 + 496) =\]

\[= 10\ 000 - 9000 = 1000\]

\[\boxed{\mathbf{4.\ }}\]

\[\textbf{а)}\ 930 \cdot 4 = 3720\]

\[\textbf{б)}\ 25 \cdot 70 = 1750\]

\[\textbf{в)}\ 870 \cdot 30 = 26\ 100\]

\[\boxed{\mathbf{5.\ }}\]

\[3 \cdot 4 \cdot 5 + 1 = 61\ (марка) - у\ \]

\[Саши.\]

\[Ответ:61\ марка.\]

\[\mathbf{Урок\ 31.\ Решение\ задач}\]