Часть 1 страница 5, ГДЗ по математике за 4 класс к рабочей тетради Дорофеева
Числа от 100 до 1 000 (Повторение)
\[{\def\arraystretch{2}\begin{array}{llll} \textcolor{#e03131}{\underline{\boldsymbol{127 \overset{\mathclap{\textcolor{#808080}{\scriptstyle \mathrm{220}}}}{+} 93}\vphantom{(}}} & \quad \textcolor{#e03131}{\underline{\boldsymbol{459 \overset{\mathclap{\textcolor{#808080}{\scriptstyle \mathrm{645}}}}{+} 186}\vphantom{(}}} & \quad 172 \overset{\mathclap{\textcolor{#808080}{\scriptstyle 312}}}{+} 140 & \quad 560 \overset{\mathclap{\textcolor{#808080}{\scriptstyle 649}}}{+} 89 \\ 39 \overset{\mathclap{\textcolor{#808080}{\scriptstyle 166}}}{+} 127 & \quad \textcolor{#e03131}{\underline{\boldsymbol{159 \overset{\mathclap{\textcolor{#808080}{\scriptstyle \mathrm{645}}}}{+} 486}\vphantom{(}}} & \quad \textcolor{#e03131}{\underline{\boldsymbol{340 \overset{\mathclap{\textcolor{#808080}{\scriptstyle \mathrm{412}}}}{+} 72}\vphantom{(}}} & \quad \textcolor{#e03131}{\underline{\boldsymbol{498 \overset{\mathclap{\textcolor{#808080}{\scriptstyle \mathrm{658}}}}{+} 160}\vphantom{(}}} \\ \textcolor{#e03131}{\underline{\boldsymbol{193 \overset{\mathclap{\textcolor{#808080}{\scriptstyle \mathrm{220}}}}{+} 27}\vphantom{(}}} & \quad 359 \overset{\mathclap{\textcolor{#808080}{\scriptstyle 545}}}{+} 186 & \quad \textcolor{#e03131}{\underline{\boldsymbol{372 \overset{\mathclap{\textcolor{#808080}{\scriptstyle \mathrm{412}}}}{+} 40}\vphantom{(}}} & \quad \textcolor{#e03131}{\underline{\boldsymbol{260 \overset{\mathclap{\textcolor{#808080}{\scriptstyle \mathrm{658}}}}{+} 398}\vphantom{(}}} \end{array}}\]
1-й способ.
\(1)\ 70 + 54 = \textcolor{#e03131}{\mathbf{124}}\text{ (ябл.)}\)
\(2)\ 70 + 48 = \textcolor{#e03131}{\mathbf{118}}\text{ (ябл.)}\)
\(3)\ 124 + 118 = \textcolor{#e03131}{\mathbf{242}}\text{ (ябл.)}\)
2-й способ.
\(1)\ 70 \cdot 2 = \textcolor{#e03131}{\mathbf{140}}\text{ (ябл.)}\)
\(2)\ 54 + 48 = \textcolor{#e03131}{\mathbf{102}}\text{ (ябл.)}\)
\(3)\ 140 + 102 = \textcolor{#e03131}{\mathbf{242}}\text{ (ябл.)}\)
Ответ. \(\textcolor{#e03131}{\mathbf{242}}\) яблока.
Найди остров, который не посетит ни один корабль. Замени одно слагаемое в сумме, записанной на нём, чтобы этот остров посетил корабль с жёлтыми парусами: \({\underline{\kern0.4em\textcolor{#e03131}{\boldsymbol{20 + 27 = 47}}\kern0.4em}\text{;}}\) корабль с зелёными парусами: \({\underline{\kern0.4em\textcolor{#e03131}{\boldsymbol{30 + 27 = 57}}\kern0.4em}\text{.}}\)
\(\textcolor{#808080}{\text{Подходят и }{10 + 37 = 47}\text{,}}\) \(\textcolor{#808080}{{10 + 7 = 17}\text{;}}\) \(\textcolor{#808080}{{10 + 47 = 57}\text{,}}\) \(\textcolor{#808080}{{10 + 17 = 27}\text{.}}\)
\[\begin{array}{c} \fcolorbox{#272727}{#8ce99a}{$12 + 15 = \boxed{\smash[b]{\underset{\hspace{1.5em}}{\textcolor{#e03131}{\mathbf{27}}}}}$} \quad \fcolorbox{#272727}{#8ce99a}{$81 : 3 = \boxed{\smash[b]{\underset{\hspace{1.5em}}{\textcolor{#e03131}{\mathbf{27}}}}}$} \quad \fcolorbox{#272727}{#ffe066}{$28 + 19 = \boxed{\smash[b]{\underset{\hspace{1.5em}}{\textcolor{#e03131}{\mathbf{47}}}}}$} \\[8pt] \fcolorbox{#272727}{#8ce99a}{$19 \cdot 3 = \boxed{\smash[b]{\underset{\hspace{1.5em}}{\textcolor{#e03131}{\mathbf{57}}}}}$} \quad \fcolorbox{#272727}{#ffe066}{$68 : 4 = \boxed{\smash[b]{\underset{\hspace{1.5em}}{\textcolor{#e03131}{\mathbf{17}}}}}$} \\[8pt] \boxed{10 + 27 = \boxed{\smash[b]{\underset{\hspace{1.5em}}{\textcolor{#e03131}{\mathbf{37}}}}}} \quad \fcolorbox{#272727}{#ffe066}{$51 : 3 = \boxed{\smash[b]{\underset{\hspace{1.5em}}{\textcolor{#e03131}{\mathbf{17}}}}}$} \quad \fcolorbox{#272727}{#8ce99a}{$62 - 35 = \boxed{\smash[b]{\underset{\hspace{1.5em}}{\textcolor{#e03131}{\mathbf{27}}}}}$} \\[8pt] \fcolorbox{#272727}{#ffe066}{$18 + 29 = \boxed{\smash[b]{\underset{\hspace{1.5em}}{\textcolor{#e03131}{\mathbf{47}}}}}$} \quad \fcolorbox{#272727}{#ffe066}{$80 - 33 = \boxed{\smash[b]{\underset{\hspace{1.5em}}{\textcolor{#e03131}{\mathbf{47}}}}}$} \quad \fcolorbox{#272727}{#ffe066}{$94 : 2 = \boxed{\smash[b]{\underset{\hspace{1.5em}}{\textcolor{#e03131}{\mathbf{47}}}}}$} \\[8pt] \fcolorbox{#272727}{#8ce99a}{$100 - 43 = \boxed{\smash[b]{\underset{\hspace{1.5em}}{\textcolor{#e03131}{\mathbf{57}}}}}$} \quad \fcolorbox{#272727}{#8ce99a}{$20 + 37 = \boxed{\smash[b]{\underset{\hspace{1.5em}}{\textcolor{#e03131}{\mathbf{57}}}}}$} \\[8pt] \fcolorbox{#272727}{#ffe066}{$50 - 33 = \boxed{\smash[b]{\underset{\hspace{1.5em}}{\textcolor{#e03131}{\mathbf{17}}}}}$} \\[8pt] \fcolorbox{#272727}{#ffe066}{$92 - 45 = \boxed{\smash[b]{\underset{\hspace{1.5em}}{\textcolor{#e03131}{\mathbf{47}}}}}$} \end{array}\]