Страница 47, ГДЗ по математике за 3 класс к тренажёру Погореловой
Сложение и вычитание. Приёмы устных вычислений
\[\begin{aligned} 352 &\mathrel{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{>}}}}\hspace{0.72em}} 325 & \qquad 571 &\mathrel{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{>}}}}\hspace{0.72em}} 517 \\ 739 &\mathrel{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{>}}}}\hspace{0.72em}} 730 & \qquad 906 &\mathrel{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{>}}}}\hspace{0.72em}} 609 \\ 486 &\mathrel{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{>}}}}\hspace{0.72em}} 468 & \qquad 254 &\mathrel{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{>}}}}\hspace{0.72em}} 245 \\ 602 &\mathrel{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{<}}}}\hspace{0.72em}} 620 & \qquad 831 &\mathrel{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{>}}}}\hspace{0.72em}} 829 \end{aligned}\]
\[\begin{aligned} 7\text{ сот. }4\text{ дес. }6\text{ ед.} + 2\text{ сот.} &= \textcolor{#e03131}{\mathbf{9}}\text{ сот. }\textcolor{#e03131}{\mathbf{4}}\text{ дес. }\textcolor{#e03131}{\mathbf{6}}\text{ ед.} \\ 4\text{ сот. }8\text{ дес. }2\text{ ед.} - 5\text{ дес.} &= \textcolor{#e03131}{\mathbf{4}}\text{ сот. }\textcolor{#e03131}{\mathbf{3}}\text{ дес. }\textcolor{#e03131}{\mathbf{2}}\text{ ед.} \\ 3\text{ сот. }5\text{ дес. }4\text{ ед.} + 3\text{ дес.} &= \textcolor{#e03131}{\mathbf{3}}\text{ сот. }\textcolor{#e03131}{\mathbf{8}}\text{ дес. }\textcolor{#e03131}{\mathbf{4}}\text{ ед.} \\ 9\text{ сот. }1\text{ дес. }7\text{ ед.} - 4\text{ ед.} &= \textcolor{#e03131}{\mathbf{9}}\text{ сот. }\textcolor{#e03131}{\mathbf{1}}\text{ дес. }\textcolor{#e03131}{\mathbf{3}}\text{ ед.} \\ 2\text{ сот. }4\text{ дес. }3\text{ ед.} + 6\text{ ед.} &= \textcolor{#e03131}{\mathbf{2}}\text{ сот. }\textcolor{#e03131}{\mathbf{4}}\text{ дес. }\textcolor{#e03131}{\mathbf{9}}\text{ ед.} \\ 6\text{ сот. }7\text{ дес. }5\text{ ед.} - 4\text{ сот.} &= \textcolor{#e03131}{\mathbf{2}}\text{ сот. }\textcolor{#e03131}{\mathbf{7}}\text{ дес. }\textcolor{#e03131}{\mathbf{5}}\text{ ед.} \end{aligned}\]
\[\begin{aligned} 7\text{ сот. }4\text{ дес.} &\mathrel{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{>}}}}\hspace{0.72em}} 704 & \qquad 4\text{ сот. }8\text{ ед.} &\mathrel{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{>}}}}\hspace{0.72em}} 48 \\ 5\text{ сот. }2\text{ ед.} &\mathrel{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{=}}}}\hspace{0.72em}} 502 & \qquad 6\text{ сот. }3\text{ дес.} &\mathrel{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{=}}}}\hspace{0.72em}} 630 \\ 3\text{ сот. }7\text{ ед.} &\mathrel{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{<}}}}\hspace{0.72em}} 370 & \qquad 2\text{ сот. }5\text{ ед.} &\mathrel{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{<}}}}\hspace{0.72em}} 250 \\ 8\text{ сот. }6\text{ дес.} &\mathrel{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{=}}}}\hspace{0.72em}} 860 & \qquad 9\text{ сот. }1\text{ дес.} &\mathrel{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{>}}}}\hspace{0.72em}} 901 \\ 6\text{ сот. }8\text{ дес.} &\mathrel{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{>}}}}\hspace{0.72em}} 608 & \qquad 4\text{ сот. }4\text{ дес.} &\mathrel{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{>}}}}\hspace{0.72em}} 404 \end{aligned}\]
