Страница 20, ГДЗ за 5 класс к математическому тренажеру Жохова

А \[\begin{array}{lll} & 1) & 2) \\[14pt] \text{Длина} & 35\text{ см} & 20\text{ м} \\[14pt] \text{Ширина} & 2\text{ см} & \underset{\textcolor{#808080}{100\,:\,20}}{\boxed{\smash[b]{\underset{\hspace{6.5em}}{\textcolor{#e03131}{\mathbf{5}}\text{ м}}}}} \\[14pt] \text{Периметр} & \underset{\textcolor{#808080}{(35\,+\,2)\,\cdot\,2}}{\boxed{\smash[b]{\underset{\hspace{6.5em}}{\textcolor{#e03131}{\mathbf{74}}\text{ см}}}}} & \underset{\textcolor{#808080}{(20\,+\,5)\,\cdot\,2}}{\boxed{\smash[b]{\underset{\hspace{6.5em}}{\textcolor{#e03131}{\mathbf{50}}\text{ м}}}}} \\[14pt] \text{Площадь} & \underset{\textcolor{#808080}{35\,\cdot\,2}}{\boxed{\smash[b]{\underset{\hspace{6.5em}}{\textcolor{#e03131}{\mathbf{70}}\text{ см}^2}}}} & 100\text{ м}^2 \end{array}\]

Б \[\begin{array}{lll} & 1) & 2) \\[14pt] \text{Длина} & 18\text{ мм} & 9\text{ см} \\[14pt] \text{Ширина} & 5\text{ мм} & \underset{\textcolor{#808080}{36\,:\,2\,-\,9}}{\boxed{\smash[b]{\underset{\hspace{6.5em}}{\textcolor{#e03131}{\mathbf{9}}\text{ см}}}}} \\[14pt] \text{Периметр} & \underset{\textcolor{#808080}{(18\,+\,5)\,\cdot\,2}}{\boxed{\smash[b]{\underset{\hspace{6.5em}}{\textcolor{#e03131}{\mathbf{46}}\text{ мм}}}}} & 36\text{ см} \\[14pt] \text{Площадь} & \underset{\textcolor{#808080}{18\,\cdot\,5}}{\boxed{\smash[b]{\underset{\hspace{6.5em}}{\textcolor{#e03131}{\mathbf{90}}\text{ мм}^2}}}} & \underset{\textcolor{#808080}{9\,\cdot\,9}}{\boxed{\smash[b]{\underset{\hspace{6.5em}}{\textcolor{#e03131}{\mathbf{81}}\text{ см}^2}}}} \end{array}\]

В \[\begin{array}{lll} & 1) & 2) \\[14pt] \text{Длина} & 16\text{ см} & \underset{\textcolor{#808080}{32\,:\,2\,-\,8}}{\boxed{\smash[b]{\underset{\hspace{6.5em}}{\textcolor{#e03131}{\mathbf{8}}\text{ м}}}}} \\[14pt] \text{Ширина} & 5\text{ см} & 8\text{ м} \\[14pt] \text{Периметр} & \underset{\textcolor{#808080}{(16\,+\,5)\,\cdot\,2}}{\boxed{\smash[b]{\underset{\hspace{6.5em}}{\textcolor{#e03131}{\mathbf{42}}\text{ см}}}}} & 32\text{ м} \\[14pt] \text{Площадь} & \underset{\textcolor{#808080}{16\,\cdot\,5}}{\boxed{\smash[b]{\underset{\hspace{6.5em}}{\textcolor{#e03131}{\mathbf{80}}\text{ см}^2}}}} & \underset{\textcolor{#808080}{8\,\cdot\,8}}{\boxed{\smash[b]{\underset{\hspace{6.5em}}{\textcolor{#e03131}{\mathbf{64}}\text{ м}^2}}}} \end{array}\]

Г \[\begin{array}{lll} & 1) & 2) \\[14pt] \text{Длина} & 4\text{ дм} & \boxed{\smash[b]{\underset{\hspace{6.5em}}{\textcolor{#e03131}{\mathbf{5}}\text{ дм}}}} \\[14pt] \text{Ширина} & \underset{\textcolor{#808080}{600\,:\,40}}{\boxed{\smash[b]{\underset{\hspace{6.5em}}{\textcolor{#e03131}{\mathbf{15}}\text{ см}}}}} & \boxed{\smash[b]{\underset{\hspace{6.5em}}{\textcolor{#e03131}{\mathbf{5}}\text{ дм}}}} \\[14pt] \text{Периметр} & \underset{\textcolor{#808080}{(40\,+\,15)\,\cdot\,2}}{\boxed{\smash[b]{\underset{\hspace{6.5em}}{\textcolor{#e03131}{\mathbf{110}}\text{ см}}}}} & 20\text{ дм} \\[14pt] \text{Площадь} & 6\text{ дм}^2 & 25\text{ дм}^2 \end{array}\] \(\textcolor{#808080}{\text{1) }{4}\text{ дм}}\) \(\textcolor{#808080}{{= 40}\text{ см, }{6\text{ дм}^2}}\) \(\textcolor{#808080}{{= 600\text{ см}^2}\text{.}}\)
\(\textcolor{#808080}{\text{2) Сумма длины}}\) \(\textcolor{#808080}{\text{и ширины равна}}\) \(\textcolor{#808080}{{20 : 2 = 10}\text{ (дм), их}}\) \(\textcolor{#808080}{\text{произведение равно }{25\text{ дм}^2}\text{;}}\) \(\textcolor{#808080}{\text{подходят }{5}\text{ дм}}\) \(\textcolor{#808080}{\text{и }{5}\text{ дм.}}\)

Д \[\begin{array}{lll} & 1) & 2) \\[14pt] \text{Длина} & 60\text{ см} & 5\text{ см} \\[14pt] \text{Ширина} & \underset{\textcolor{#808080}{20\,:\,2\,-\,6}}{\boxed{\smash[b]{\underset{\hspace{6.5em}}{\textcolor{#e03131}{\mathbf{4}}\text{ дм}}}}} & 8\text{ мм} \\[14pt] \text{Периметр} & 20\text{ дм} & \underset{\textcolor{#808080}{(50\,+\,8)\,\cdot\,2}}{\boxed{\smash[b]{\underset{\hspace{6.5em}}{\textcolor{#e03131}{\mathbf{116}}\text{ мм}}}}} \\[14pt] \text{Площадь} & \underset{\textcolor{#808080}{6\,\cdot\,4}}{\boxed{\smash[b]{\underset{\hspace{6.5em}}{\textcolor{#e03131}{\mathbf{24}}\text{ дм}^2}}}} & \underset{\textcolor{#808080}{50\,\cdot\,8}}{\boxed{\smash[b]{\underset{\hspace{6.5em}}{\textcolor{#e03131}{\mathbf{400}}\text{ мм}^2}}}} \end{array}\] \(\textcolor{#808080}{\text{1) }{60}\text{ см}}\) \(\textcolor{#808080}{{= 6}\text{ дм.}}\)
\(\textcolor{#808080}{\text{2) }{5}\text{ см}}\) \(\textcolor{#808080}{{= 50}\text{ мм.}}\)

Е \[\begin{array}{lll} & 1) & 2) \\[14pt] \text{Длина} & 45\text{ см} & \underset{\textcolor{#808080}{100\,:\,4}}{\boxed{\smash[b]{\underset{\hspace{6.5em}}{\textcolor{#e03131}{\mathbf{25}}\text{ дм}}}}} \\[14pt] \text{Ширина} & 2\text{ дм} & 4\text{ дм} \\[14pt] \text{Периметр} & \underset{\textcolor{#808080}{(45\,+\,20)\,\cdot\,2}}{\boxed{\smash[b]{\underset{\hspace{6.5em}}{\textcolor{#e03131}{\mathbf{130}}\text{ см}}}}} & \underset{\textcolor{#808080}{(25\,+\,4)\,\cdot\,2}}{\boxed{\smash[b]{\underset{\hspace{6.5em}}{\textcolor{#e03131}{\mathbf{58}}\text{ дм}}}}} \\[14pt] \text{Площадь} & \underset{\textcolor{#808080}{45\,\cdot\,20}}{\boxed{\smash[b]{\underset{\hspace{6.5em}}{\textcolor{#e03131}{\mathbf{900}}\text{ см}^2}}}} & 100\text{ дм}^2 \end{array}\] \(\textcolor{#808080}{\text{1) }{2}\text{ дм}}\) \(\textcolor{#808080}{{= 20}\text{ см.}}\)