\[\boxed{\mathbf{Страница\ 56.}еуроки - ответы\ на\ пятёрку}\]
\[\boxed{\mathbf{4.1.}}\]
\[\textbf{а)}\]
\[\textbf{б)}\ \]
\[\boxed{\mathbf{4.2.}}\]
\[\textbf{а)}\ 64\ 012 - x = 56\ 938\]
\[x = 64\ 012 - 56\ 938\]
\[x = 7074.\]
\[\textbf{б)}\ x + 49\ 495 = 120\ 001\]
\[x = 120\ 001 - 49\ 495\]
\[x = 70\ 506.\]
\[\boxed{\mathbf{4.3.}}\]
\[a + 14 < a + 20\]
\[43 + c > c + 34\]
\[56 - b < 70 - b\]
\[m - 39 < m - 25\]
\[x + (13 + y) > y + (x + 7)\]
\[a - (b + c) = a - b - c\]
\[\boxed{\mathbf{4.4.}}\]
\[\textbf{а)}\ 400 + 100 < 487 + 159 < 500 + 200\]
\[500 < 487 + 159 < 700\ \]
\[\textbf{б)}\ 600 - 300 < 612 - 278 < 700 - 200\]
\[300 < 612 - 278 < 500\ \]
\[\boxed{\mathbf{4.5.}}\]
\[Разность\ не\ изменится.\]
\[\boxed{\mathbf{5.1.}}\]
\[\textbf{а)}\]
\[\textbf{б)}\ \]