а) 635400 : 9 : 100 + 9004 * 50 − (52360 − 57 * 65);
б) 603 * (1812 : 2) * 30 − (790 * 970 − 92142 : 6).

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ГДЗ учебник по математике 4 класс Петерсон. Часть 1. 5 урок. Номер №12

635400 : 9 : 100 + 9004 * 50 − (52360 − 57 * 65) = 70600 : 100 + 450200 − (52360 − 3705) = 706 + 450200 − 48655 = 450906 − 48655 = 402251

\begin{array}{r} \times \underline{\begin{array}{r} 57 \\ 65 \end{array}} \\ 285 \\ 342 \\ \bar{3705} \end{array}

\begin{array}{r} \begin{array}{r} - \end{array} \begin{array}{r} 52360 \\ 3705 \end{array} \\ \begin{array}{r} 48655 \end{array} \end{array}

\begin{matrix} \begin{array}{l} \underline{} 635400 \\ \underline{63} \\ \underline{} 5 \\ \underline{0} \\ \underline{} 54 \\ \underline{54} \\ \underline{} 0 \\ \underline{0} \\ \underline{} 0 \\ \underline{0} \\ 0 \end{array} & \begin{array}{l} 9 \\ \bar{70600} \end{array} \end{matrix}

70600 : 100 = 706

\begin{array}{r} \times \underline{\begin{array}{r} 9004 \\ 50 \end{array}} \\ 0 \\ 45020 \\ \bar{450200} \end{array}

\begin{array}{r} \begin{array}{r} + \end{array} \begin{array}{r} 706 \\ 450200 \end{array} \\ \begin{array}{r} 450906 \end{array} \end{array}

\begin{array}{r} \begin{array}{r} - \end{array} \begin{array}{r} 450906 \\ 48655 \end{array} \\ \begin{array}{r} 402251 \end{array} \end{array}

603 * (1812 : 2) * 30 − (790 * 970 − 92142 : 6) = 603 * 906 * 30 − (766300 − 15357) = 546318 * 30 − 750943 = 16389540 − 750943 = 15638597

\begin{matrix} \begin{array}{l} \underline{} 1812 \\ \underline{18} \\ \underline{} 1 \\ \underline{0} \\ \underline{} 12 \\ \underline{12} \\ 0 \end{array} & \begin{array}{l} 2 \\ \bar{906} \end{array} \end{matrix}

\begin{array}{r} \times \underline{\begin{array}{r} 790 \\ 904 \end{array}} \\ 3160 \\ 0 \\ 7110 \\ \bar{714160} \end{array}

\begin{matrix} \begin{array}{l} \underline{} 92142 \\ \underline{6} \\ \underline{} 32 \\ \underline{30} \\ \underline{} 21 \\ \underline{18} \\ \underline{} 34 \\ \underline{30} \\ \underline{} 42 \\ \underline{42} \\ 0 \end{array} & \begin{array}{l} 6 \\ \bar{15357} \end{array} \end{matrix}

\begin{array}{r} \begin{array}{r} - \end{array} \begin{array}{r} 766300 \\ 15357 \end{array} \\ \begin{array}{r} 750943 \end{array} \end{array}

\begin{array}{r} \times \underline{\begin{array}{r} 603 \\ 906 \end{array}} \\ 3618 \\ 0 \\ 5427 \\ \bar{546318} \end{array}

\begin{array}{r} \times \underline{\begin{array}{r} 546318 \\ 30 \end{array}} \\ 0 \\ 1638954 \\ \bar{16389540} \end{array}

\begin{array}{r} \begin{array}{r} - \end{array} \begin{array}{r} 16389540 \\ 750943 \end{array} \\ \begin{array}{r} 15638597 \end{array} \end{array}

ГДЗ Математика 4 класс Петерсон