Страница 28, ГДЗ за 5 класс к математическому тренажеру Жохова
Задание 15. Все арифметические действия с натуральными числами и нулём (и сводящиеся к ним)
А \[\begin{array}{ll} \hspace{0.8em}\begin{array}{r} \mathllap{1)\ }1\,000 : 50\mathrlap{\quad\textcolor{#808080}{\scriptstyle 20}} \\ \cdot\,60\mathrlap{\quad\textcolor{#808080}{\scriptstyle 1\,200}} \\ -\,300\mathrlap{\quad\textcolor{#808080}{\scriptstyle 900}} \\ +\,100 \\ \hline \textcolor{#e03131}{\mathbf{1\,000}} \end{array}\hspace{2.58em} & \quad \hspace{0.8em}\begin{array}{r} \mathllap{2)\ }730 - 440\mathrlap{\quad\textcolor{#808080}{\scriptstyle 290}} \\ {:}\,10\mathrlap{\quad\textcolor{#808080}{\scriptstyle 29}} \\ +\,71\mathrlap{\quad\textcolor{#808080}{\scriptstyle 100}} \\ \cdot\,2 \\ \hline \textcolor{#e03131}{\mathbf{200}} \end{array}\hspace{2.09em} \\ \\ \hspace{0.8em}\begin{array}{r} \mathllap{3)\ }100 \cdot 40\mathrlap{\quad\textcolor{#808080}{\scriptstyle 4\,000}} \\ -\,3\,100\mathrlap{\quad\textcolor{#808080}{\scriptstyle 900}} \\ {:}\,30\mathrlap{\quad\textcolor{#808080}{\scriptstyle 30}} \\ +\,47 \\ \hline \textcolor{#e03131}{\mathbf{77}} \end{array}\hspace{2.58em} & \quad \hspace{0.8em}\begin{array}{r} \mathllap{4)\ }250 : 50\mathrlap{\quad\textcolor{#808080}{\scriptstyle 5}} \\ \cdot\,80\mathrlap{\quad\textcolor{#808080}{\scriptstyle 400}} \\ -\,120\mathrlap{\quad\textcolor{#808080}{\scriptstyle 280}} \\ +\,20 \\ \hline \textcolor{#e03131}{\mathbf{300}} \end{array}\hspace{2.09em} \end{array}\]
Б \[\begin{array}{ll} \hspace{0.8em}\begin{array}{r} \mathllap{1)\ }370 + 180\mathrlap{\quad\textcolor{#808080}{\scriptstyle 550}} \\ {:}\,50\mathrlap{\quad\textcolor{#808080}{\scriptstyle 11}} \\ +\,89\mathrlap{\quad\textcolor{#808080}{\scriptstyle 100}} \\ -\,100 \\ \hline \textcolor{#e03131}{\mathbf{0}} \end{array}\hspace{2.09em} & \quad \hspace{0.8em}\begin{array}{r} \mathllap{2)\ }2 \cdot 70\mathrlap{\quad\textcolor{#808080}{\scriptstyle 140}} \\ {:}\,10\mathrlap{\quad\textcolor{#808080}{\scriptstyle 14}} \\ +\,86\mathrlap{\quad\textcolor{#808080}{\scriptstyle 100}} \\ -\,30 \\ \hline \textcolor{#e03131}{\mathbf{70}} \end{array}\hspace{2.09em} \\ \\ \hspace{0.8em}\begin{array}{r} \mathllap{3)\ }4 \cdot 250\mathrlap{\quad\textcolor{#808080}{\scriptstyle 1\,000}} \\ \cdot\,3\mathrlap{\quad\textcolor{#808080}{\scriptstyle 3\,000}} \\ -\,500\mathrlap{\quad\textcolor{#808080}{\scriptstyle 2\,500}} \\ {:}\,100 \\ \hline \textcolor{#e03131}{\mathbf{25}} \end{array}\hspace{2.58em} & \quad \hspace{0.8em}\begin{array}{r} \mathllap{4)\ }230 - 170\mathrlap{\quad\textcolor{#808080}{\scriptstyle 60}} \\ {:}\,12\mathrlap{\quad\textcolor{#808080}{\scriptstyle 5}} \\ \cdot\,30\mathrlap{\quad\textcolor{#808080}{\scriptstyle 150}} \\ -\,40 \\ \hline \textcolor{#e03131}{\mathbf{110}} \end{array}\hspace{2.09em} \end{array}\]
В \[\begin{array}{ll} \hspace{0.8em}\begin{array}{r} \mathllap{1)\ }100 \cdot 80\mathrlap{\quad\textcolor{#808080}{\scriptstyle 8\,000}} \\ -\,3\,100\mathrlap{\quad\textcolor{#808080}{\scriptstyle 4\,900}} \\ {:}\,70\mathrlap{\quad\textcolor{#808080}{\scriptstyle 70}} \\ +\,65 \\ \hline \textcolor{#e03131}{\mathbf{135}} \end{array}\hspace{2.58em} & \quad \hspace{0.8em}\begin{array}{r} \mathllap{2)\ }400 + 800\mathrlap{\quad\textcolor{#808080}{\scriptstyle 1\,200}} \\ {:}\,20\mathrlap{\quad\textcolor{#808080}{\scriptstyle 60}} \\ \cdot\,8\mathrlap{\quad\textcolor{#808080}{\scriptstyle 480}} \\ -\,190 \\ \hline \textcolor{#e03131}{\mathbf{290}} \end{array}\hspace{2.58em} \\ \\ \hspace{0.8em}\begin{array}{r} \mathllap{3)\ }2\,500 : 500\mathrlap{\quad\textcolor{#808080}{\scriptstyle 5}} \\ \cdot\,70\mathrlap{\quad\textcolor{#808080}{\scriptstyle 350}} \\ +\,650\mathrlap{\quad\textcolor{#808080}{\scriptstyle 1\,000}} \\ -\,220 \\ \hline \textcolor{#e03131}{\mathbf{780}} \end{array}\hspace{2.58em} & \quad \hspace{0.8em}\begin{array}{r} \mathllap{4)\ }880 - 430\mathrlap{\quad\textcolor{#808080}{\scriptstyle 450}} \\ {:}\,9\mathrlap{\quad\textcolor{#808080}{\scriptstyle 50}} \\ +\,650\mathrlap{\quad\textcolor{#808080}{\scriptstyle 700}} \\ \cdot\,2 \\ \hline \textcolor{#e03131}{\mathbf{1\,400}} \end{array}\hspace{2.09em} \end{array}\]
Г \[\begin{array}{ll} \hspace{0.8em}\begin{array}{r} \mathllap{1)\ }240 : 30\mathrlap{\quad\textcolor{#808080}{\scriptstyle 8}} \\ \cdot\,70\mathrlap{\quad\textcolor{#808080}{\scriptstyle 560}} \\ -\,180\mathrlap{\quad\textcolor{#808080}{\scriptstyle 380}} \\ +\,130 \\ \hline \textcolor{#e03131}{\mathbf{510}} \end{array}\hspace{2.09em} & \quad \hspace{0.8em}\begin{array}{r} \mathllap{2)\ }3 \cdot 70\mathrlap{\quad\textcolor{#808080}{\scriptstyle 210}} \\ +\,190\mathrlap{\quad\textcolor{#808080}{\scriptstyle 400}} \\ {:}\,5\mathrlap{\quad\textcolor{#808080}{\scriptstyle 80}} \\ -\,55 \\ \hline \textcolor{#e03131}{\mathbf{25}} \end{array}\hspace{2.09em} \\ \\ \hspace{0.8em}\begin{array}{r} \mathllap{3)\ }470 + 160\mathrlap{\quad\textcolor{#808080}{\scriptstyle 630}} \\ {:}\,90\mathrlap{\quad\textcolor{#808080}{\scriptstyle 7}} \\ \cdot\,20\mathrlap{\quad\textcolor{#808080}{\scriptstyle 140}} \\ -\,45 \\ \hline \textcolor{#e03131}{\mathbf{95}} \end{array}\hspace{2.09em} & \quad \hspace{0.8em}\begin{array}{r} \mathllap{4)\ }330 - 180\mathrlap{\quad\textcolor{#808080}{\scriptstyle 150}} \\ \cdot\,2\mathrlap{\quad\textcolor{#808080}{\scriptstyle 300}} \\ +\,240\mathrlap{\quad\textcolor{#808080}{\scriptstyle 540}} \\ {:}\,60 \\ \hline \textcolor{#e03131}{\mathbf{9}} \end{array}\hspace{2.09em} \end{array}\]
Д \[\begin{array}{ll} \hspace{0.8em}\begin{array}{r} \mathllap{1)\ }700 : 70\mathrlap{\quad\textcolor{#808080}{\scriptstyle 10}} \\ \cdot\,40\mathrlap{\quad\textcolor{#808080}{\scriptstyle 400}} \\ -\,130\mathrlap{\quad\textcolor{#808080}{\scriptstyle 270}} \\ +\,25 \\ \hline \textcolor{#e03131}{\mathbf{295}} \end{array}\hspace{2.09em} & \quad \hspace{0.8em}\begin{array}{r} \mathllap{2)\ }80 \cdot 3\mathrlap{\quad\textcolor{#808080}{\scriptstyle 240}} \\ +\,160\mathrlap{\quad\textcolor{#808080}{\scriptstyle 400}} \\ {:}\,4\mathrlap{\quad\textcolor{#808080}{\scriptstyle 100}} \\ -\,25 \\ \hline \textcolor{#e03131}{\mathbf{75}} \end{array}\hspace{2.09em} \\ \\ \hspace{0.8em}\begin{array}{r} \mathllap{3)\ }710 - 280\mathrlap{\quad\textcolor{#808080}{\scriptstyle 430}} \\ {:}\,43\mathrlap{\quad\textcolor{#808080}{\scriptstyle 10}} \\ \cdot\,50\mathrlap{\quad\textcolor{#808080}{\scriptstyle 500}} \\ -\,100 \\ \hline \textcolor{#e03131}{\mathbf{400}} \end{array}\hspace{2.09em} & \quad \hspace{0.8em}\begin{array}{r} \mathllap{4)\ }180 : 20\mathrlap{\quad\textcolor{#808080}{\scriptstyle 9}} \\ +\,11\mathrlap{\quad\textcolor{#808080}{\scriptstyle 20}} \\ \cdot\,8\mathrlap{\quad\textcolor{#808080}{\scriptstyle 160}} \\ -\,65 \\ \hline \textcolor{#e03131}{\mathbf{95}} \end{array}\hspace{2.09em} \end{array}\]