\[\boxed{\mathbf{1}\mathbf{.2}}\]
\[\mathbf{Количество\ прочитанных}\] \[\mathbf{учеником\ книг}\] |
\[\mathbf{Подсчет}\] | \[\mathbf{Число\ учеников}\] | \[\mathbf{Всего}\] |
---|---|---|---|
\[3\] | \[\backslash\backslash\backslash\backslash\] | \[4\] | \[3 \cdot 4 = 12\] |
\[4\] | \(\backslash\backslash\backslash\backslash\) \(\backslash\)\ | \[7\] | \[4 \cdot 7 = 28\] |
\[5\] | \(\backslash\backslash\backslash\backslash\) \(\backslash\backslash\backslash\) | \[8\] | \[5 \cdot 8 = 40\] |
\[6\] | \(\backslash\backslash\backslash\backslash\) \(\backslash\backslash\backslash\) | \[8\] | \[6 \cdot 8 = 48\] |
\[7\] | \[\backslash\backslash\backslash\backslash\] | \[4\] | \[7 \cdot 4 = 28\] |
\[Итого\] | \[156\] |
\[\textbf{а)}\ Семь\ книг\ прочитали\ \]
\[4\ ученика.\]
\[\textbf{б)}\ Восемь\ книг\ прочитали\ \]
\[0\ учеников.\]
\[\textbf{в)}\ Всего\ пятиклассники\ \]
\[прочитали:\]
\[12 + 28 + 40 + 48 + 28 =\]
\[= 40 + 40 + 72 = 80 + 72 =\]
\[= 156\ (книг).\]