ГДЗ Математика 5 класс Мерзляк. Задание 13

ОТВЕТЫ К ЗАДАНИЯМ

Выполните действия:
1) 43 + 24 * 58 − 39;
2) (43 + 24) * 58 − 39;
3) 43 + 24 * (58 − 39);
4) (43 + 24) * (58 − 39).

43 + 24 * 58 − 39 = 43 + 1392 − 39 = 1396
1)

\begin{array}{r} \times \underline{\begin{array}{r} 24 \\ 58 \end{array}} \\ 192 \\ 120 \\ \bar{1392} \end{array}

\begin{array}{r} \begin{array}{r} + \end{array} \begin{array}{r} 43 \\ 1392 \end{array} \\ \begin{array}{r} 1435 \end{array} \end{array}

\begin{array}{r} \begin{array}{r} — \end{array} \begin{array}{r} 1435 \\ 39 \end{array} \\ \begin{array}{r} 1396 \end{array} \end{array}

(43 + 24) * 58 − 39 = 67 * 58 − 39 = 3886 − 39 = 3847
1)

\begin{array}{r} \begin{array}{r} + \end{array} \begin{array}{r} 43 \\ 24 \end{array} \\ \begin{array}{r} 67 \end{array} \end{array}

\begin{array}{r} \times \underline{\begin{array}{r} 67 \\ 58 \end{array}} \\ 536 \\ 335 \\ \bar{3886} \end{array}

\begin{array}{r} \begin{array}{r} — \end{array} \begin{array}{r} 3886 \\ 39 \end{array} \\ \begin{array}{r} 3847 \end{array} \end{array}

43 + 24 * (58 − 39) = 43 + 24 * 19 = 43 + 456 = 499
1)

\begin{array}{r} \begin{array}{r} — \end{array} \begin{array}{r} 58 \\ 39 \end{array} \\ \begin{array}{r} 19 \end{array} \end{array}

\begin{array}{r} \times \underline{\begin{array}{r} 24 \\ 19 \end{array}} \\ 216 \\ 24 \\ \bar{456} \end{array}

\begin{array}{r} \begin{array}{r} + \end{array} \begin{array}{r} 43 \\ 456 \end{array} \\ \begin{array}{r} 499 \end{array} \end{array}

(43 + 24) * (58 − 39) = 67 * 19 = 1273
1)

\begin{array}{r} \begin{array}{r} + \end{array} \begin{array}{r} 43 \\ 24 \end{array} \\ \begin{array}{r} 67 \end{array} \end{array}

\begin{array}{r} \begin{array}{r} — \end{array} \begin{array}{r} 58 \\ 39 \end{array} \\ \begin{array}{r} 19 \end{array} \end{array}

\begin{array}{r} \times \underline{\begin{array}{r} 67 \\ 19 \end{array}} \\ 603 \\ 67 \\ \bar{1273} \end{array}