Учебник по математике 5 класс Мерзляк

авторы: А.Г. Мерзляк, В.Б. Полонский, М.С. Якир.

издательство: Вентана-Граф, 2018 г.

Номер №890

5,68 + 13,27 + 4,9 = 18,95 + 4,9 = 23,85
1)

\begin{array}{r} \begin{array}{r} + \end{array} \begin{array}{r} 5.68 \\ 13.27 \end{array} \\ \begin{array}{r} 18.95 \end{array} \end{array}

\begin{array}{r} \begin{array}{r} + \end{array} \begin{array}{r} 18.95 \\ 4.90 \end{array} \\ \begin{array}{r} 23.85 \end{array} \end{array}

18,35 + 1,4 + 38,016 = 19,75 + 38,016 = 57,766
1)

\begin{array}{r} \begin{array}{r} + \end{array} \begin{array}{r} 18.35 \\ 1.40 \end{array} \\ \begin{array}{r} 19.75 \end{array} \end{array}

\begin{array}{r} \begin{array}{r} + \end{array} \begin{array}{r} 19.750 \\ 38.016 \end{array} \\ \begin{array}{r} 57.766 \end{array} \end{array}

16,528 + 42,5 + 13,472 = 59,028 + 13,472 = 72,5
1)

\begin{array}{r} \begin{array}{r} + \end{array} \begin{array}{r} 16.528 \\ 42.500 \end{array} \\ \begin{array}{r} 59.028 \end{array} \end{array}

\begin{array}{r} \begin{array}{r} + \end{array} \begin{array}{r} 59.028 \\ 13.472 \end{array} \\ \begin{array}{r} 72.500 \end{array} \end{array}

76,1 + 38,83 + 24,9 + 52,17 = 114,93 + 24,9 + 52,17 = 139,83 + 52,17 = 192
1)

\begin{array}{r} \begin{array}{r} + \end{array} \begin{array}{r} 76.10 \\ 38.83 \end{array} \\ \begin{array}{r} 114.93 \end{array} \end{array}

\begin{array}{r} \begin{array}{r} + \end{array} \begin{array}{r} 114.93 \\ 24.90 \end{array} \\ \begin{array}{r} 139.83 \end{array} \end{array}

\begin{array}{r} \begin{array}{r} + \end{array} \begin{array}{r} 139.83 \\ 52.17 \end{array} \\ \begin{array}{r} 192.00 \end{array} \end{array}

14,02 − 10,379 + 5,004 − 7,3245 = 3,641 + 5,004 − 7,3245 = 8,645 − 7,3245 = 1,3205
1)

\begin{array}{r} \begin{array}{r} - \end{array} \begin{array}{r} 14.020 \\ 10.379 \end{array} \\ \begin{array}{r} 3.641 \end{array} \end{array}

\begin{array}{r} \begin{array}{r} + \end{array} \begin{array}{r} 3.641 \\ 5.004 \end{array} \\ \begin{array}{r} 8.645 \end{array} \end{array}

\begin{array}{r} \begin{array}{r} - \end{array} \begin{array}{r} 8.6450 \\ 7.3245 \end{array} \\ \begin{array}{r} 1.3205 \end{array} \end{array}

642,7 − (365,2 − 41,54 + 125,086) = 642,7 − (323,66 + 125,086) = 642,7 − 448,746 = 193,954
1)

\begin{array}{r} \begin{array}{r} - \end{array} \begin{array}{r} 365.20 \\ 41.54 \end{array} \\ \begin{array}{r} 323.66 \end{array} \end{array}

\begin{array}{r} \begin{array}{r} + \end{array} \begin{array}{r} 323.660 \\ 125.086 \end{array} \\ \begin{array}{r} 448.746 \end{array} \end{array}

\begin{array}{r} \begin{array}{r} - \end{array} \begin{array}{r} 642.700 \\ 448.746 \end{array} \\ \begin{array}{r} 193.954 \end{array} \end{array}