Страница 21, ГДЗ по математике за 2 класс к тренажёру Погореловой

\[\begin{aligned} 43 \overset{\mathclap{\textcolor{#808080}{\scriptstyle 50}}}{+} 7 &\mathrel{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{<}}}}\hspace{0.72em}} 60 & \qquad 55 \overset{\mathclap{\textcolor{#808080}{\scriptstyle 60}}}{+} 5 &\mathrel{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{<}}}}\hspace{0.72em}} 70 \\ 80 \overset{\mathclap{\textcolor{#808080}{\scriptstyle 75}}}{-} 5 &\mathrel{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{<}}}}\hspace{0.72em}} 85 & \qquad 38 \overset{\mathclap{\textcolor{#808080}{\scriptstyle 40}}}{+} 2 &\mathrel{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{=}}}}\hspace{0.72em}} 40 \\ 24 \overset{\mathclap{\textcolor{#808080}{\scriptstyle 30}}}{+} 6 &\mathrel{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{=}}}}\hspace{0.72em}} 30 & \qquad 90 \overset{\mathclap{\textcolor{#808080}{\scriptstyle 84}}}{-} 6 &\mathrel{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{<}}}}\hspace{0.72em}} 86 \\ 60 \overset{\mathclap{\textcolor{#808080}{\scriptstyle 57}}}{-} 3 &\mathrel{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{>}}}}\hspace{0.72em}} 47 & \qquad 46 \overset{\mathclap{\textcolor{#808080}{\scriptstyle 50}}}{+} 4 &\mathrel{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{>}}}}\hspace{0.72em}} 40 \\ 30 \overset{\mathclap{\textcolor{#808080}{\scriptstyle 22}}}{-} 8 &\mathrel{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{<}}}}\hspace{0.72em}} 23 & \qquad 70 \overset{\mathclap{\textcolor{#808080}{\scriptstyle 61}}}{-} 9 &\mathrel{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{<}}}}\hspace{0.72em}} 81 \\ 51 \overset{\mathclap{\textcolor{#808080}{\scriptstyle 60}}}{+} 9 &\mathrel{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{=}}}}\hspace{0.72em}} 60 & \qquad 50 \overset{\mathclap{\textcolor{#808080}{\scriptstyle 48}}}{-} 2 &\mathrel{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{=}}}}\hspace{0.72em}} 48 \\ 80 \overset{\mathclap{\textcolor{#808080}{\scriptstyle 76}}}{-} 4 &\mathrel{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{<}}}}\hspace{0.72em}} 96 & \qquad 63 \overset{\mathclap{\textcolor{#808080}{\scriptstyle 70}}}{+} 7 &\mathrel{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{=}}}}\hspace{0.72em}} 70 \\ 45 \overset{\mathclap{\textcolor{#808080}{\scriptstyle 50}}}{+} 5 &\mathrel{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{=}}}}\hspace{0.72em}} 50 & \qquad 80 \overset{\mathclap{\textcolor{#808080}{\scriptstyle 75}}}{-} 5 &\mathrel{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{<}}}}\hspace{0.72em}} 85 \\ 70 \overset{\mathclap{\textcolor{#808080}{\scriptstyle 68}}}{-} 2 &\mathrel{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{>}}}}\hspace{0.72em}} 67 & \qquad 24 \overset{\mathclap{\textcolor{#808080}{\scriptstyle 30}}}{+} 6 &\mathrel{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{<}}}}\hspace{0.72em}} 60 \\ 27 \overset{\mathclap{\textcolor{#808080}{\scriptstyle 30}}}{+} 3 &\mathrel{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{>}}}}\hspace{0.72em}} 20 & \qquad 51 \overset{\mathclap{\textcolor{#808080}{\scriptstyle 60}}}{+} 9 &\mathrel{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{<}}}}\hspace{0.72em}} 70 \\ 40 \overset{\mathclap{\textcolor{#808080}{\scriptstyle 36}}}{-} 4 &\mathrel{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{<}}}}\hspace{0.72em}} 37 & \qquad 80 \overset{\mathclap{\textcolor{#808080}{\scriptstyle 73}}}{-} 7 &\mathrel{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{=}}}}\hspace{0.72em}} 73 \end{aligned}\]

Было — \(40\text{ м}\)
Отрезали — \(6\text{ м}\)
Осталось — ?
\(40 - 6 = \textcolor{#e03131}{\mathbf{34}}\text{ (м)}\)
Ответ: осталось \(\textcolor{#e03131}{\mathbf{34}}\) м.

Было — ?
Продали — \(57\text{ кг}\)
Осталось — \(3\text{ кг}\)
\(57 + 3 = \textcolor{#e03131}{\mathbf{60}}\text{ (кг)}\)
Ответ: было \(\textcolor{#e03131}{\mathbf{60}}\) кг.