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(68 + 49) * 4 − 117 * 5 : 9;
(187 + 369) : 4 + 124 * 6 : 8;
(76 + 58) * 3 + (218 + 247) : 5;
(389 + 276) : 7 − 135 * 4 : 6.

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ГДЗ учебник по математике 4 класс Дорофеев. Часть 1 страница 50. Номер №6

(68 + 49) * 4 − 117 * 5 : 9 = 117 * 4 − 585 : 9 = 468 − 65 = 403

\begin{array}{r} \begin{array}{r} + \end{array} \begin{array}{r} 68 \\ 49 \end{array} \\ \begin{array}{r} 117 \end{array} \end{array}

\begin{array}{r} \times \underline{\begin{array}{r} 117 \\ 4 \end{array}} \\ 468 \end{array}

\begin{array}{r} \times \underline{\begin{array}{r} 117 \\ 5 \end{array}} \\ 585 \end{array}

\begin{matrix} \begin{array}{l} \underline{} 585 \\ \underline{54} \\ \underline{} 45 \\ \underline{45} \\ 0 \end{array} & \begin{array}{l} 9 \\ \bar{65} \end{array} \end{matrix}

\begin{array}{r} \begin{array}{r} - \end{array} \begin{array}{r} 468 \\ 65 \end{array} \\ \begin{array}{r} 403 \end{array} \end{array}

(187 + 369) : 4 + 124 * 6 : 8 = 556 : 4 + 744 : 8 = 139 + 93 = 232

\begin{array}{r} \begin{array}{r} + \end{array} \begin{array}{r} 187 \\ 369 \end{array} \\ \begin{array}{r} 556 \end{array} \end{array}

\begin{matrix} \begin{array}{l} \underline{} 556 \\ \underline{4} \\ \underline{} 15 \\ \underline{12} \\ \underline{} 36 \\ \underline{36} \\ 0 \end{array} & \begin{array}{l} 4 \\ \bar{139} \end{array} \end{matrix}

\begin{array}{r} \times \underline{\begin{array}{r} 124 \\ 6 \end{array}} \\ 744 \end{array}

\begin{matrix} \begin{array}{l} \underline{} 744 \\ \underline{72} \\ \underline{} 24 \\ \underline{24} \\ 0 \end{array} & \begin{array}{l} 8 \\ \bar{93} \end{array} \end{matrix}

\begin{array}{r} \begin{array}{r} + \end{array} \begin{array}{r} 139 \\ 93 \end{array} \\ \begin{array}{r} 232 \end{array} \end{array}

(76 + 58) * 3 + (218 + 247) : 5 = 134 * 3 + 465 : 5 = 402 + 93 = 495

\begin{array}{r} \begin{array}{r} + \end{array} \begin{array}{r} 76 \\ 58 \end{array} \\ \begin{array}{r} 134 \end{array} \end{array}

\begin{array}{r} \begin{array}{r} + \end{array} \begin{array}{r} 218 \\ 247 \end{array} \\ \begin{array}{r} 465 \end{array} \end{array}

\begin{array}{r} \times \underline{\begin{array}{r} 134 \\ 3 \end{array}} \\ 402 \end{array}

\begin{matrix} \begin{array}{l} \underline{} 465 \\ \underline{45} \\ \underline{} 15 \\ \underline{15} \\ 0 \end{array} & \begin{array}{l} 5 \\ \bar{93} \end{array} \end{matrix}

\begin{array}{r} \begin{array}{r} + \end{array} \begin{array}{r} 402 \\ 93 \end{array} \\ \begin{array}{r} 495 \end{array} \end{array}

(389 + 276) : 7 − 135 * 4 : 6 = 665 : 7 − 540 : 6 = 95 − 90 = 5

\begin{array}{r} \begin{array}{r} + \end{array} \begin{array}{r} 389 \\ 276 \end{array} \\ \begin{array}{r} 665 \end{array} \end{array}

\begin{matrix} \begin{array}{l} \underline{} 665 \\ \underline{63} \\ \underline{} 35 \\ \underline{35} \\ 0 \end{array} & \begin{array}{l} 7 \\ \bar{95} \end{array} \end{matrix}

\begin{array}{r} \times \underline{\begin{array}{r} 135 \\ 4 \end{array}} \\ 540 \end{array}

\begin{matrix} \begin{array}{l} \underline{} 540 \\ \underline{54} \\ \underline{} 0 \\ \underline{0} \\ 0 \end{array} & \begin{array}{l} 6 \\ \bar{90} \end{array} \end{matrix}

90 − 90 = 5

ГДЗ Математика 4 класс Дорофеев, Миракова, Бука, 2015