\[Страница\ 32.\]
\[\boxed{\mathbf{3}.}\]
\[a = b \cdot q + r\]
\[Делимое\ a\] | \[Делитель\ b\] | \[Неполное\ частное\ q\] | \[Остаток\ r\] |
---|---|---|---|
\[5092\] | \[48\] | \[106\] | \[4\] |
\[1483\] | \[34\] | \[43\] | \[21\] |
\[2348\] | \[85\] | \[27\] | \[53\] |
\[34 \cdot 43 + 21 = 1462 +\]
\[+ 21 = 1483\]
\[(2348 - 53)\ :27 =\]
\[= 2295\ :27 = 85\]
\[15.\ Упрощение\ выражений\]
\[\boxed{\mathbf{1}.}\]
\[\textbf{а)}\ 32 \cdot 9 + 68 \cdot 9 =\]
\[= (32 + 68) \cdot 9 =\]
\[= 100 \cdot 9 = 900\]
\[\textbf{б)}\ 167 \cdot 8 + 33 \cdot 8 =\]
\[= 8 \cdot (167 + 33) =\]
\[= 8 \cdot 200 = 1600\]
\[\textbf{в)}\ 254 \cdot 12 - 12 \cdot 54 =\]
\[= (254 - 54) \cdot 12 =\]
\[= 200 \cdot 12 = 2400\]
\[\textbf{г)}\ 32 \cdot 146 - 46 \cdot 32 =\]
\[= (146 - 46) \cdot 32 =\]
\[= 100 \cdot 32 = 3200\]
\[\boxed{\mathbf{2}.}\]
\[\textbf{а)}\ (13 + a) \cdot 6 = 13 \cdot 6 +\]
\[+ a \cdot 6 = 78 + a \cdot 6\]
\[\textbf{б)}\ (b + 24) \cdot 3 = b \cdot 3 +\]
\[+ 24 \cdot 3 = b \cdot 3 + 72\]
\[\textbf{в)}\ 5 \cdot (x - 15) = 5 \cdot x -\]
\[- 5 \cdot 15 = 5 \cdot x - 75\]
\[Страница\ 33.\]
\[\boxed{\mathbf{3}.}\]
\[\textbf{а)}\ 63 \cdot a + 37 \cdot a =\]
\[= (63 + 37) \cdot a = 100 \cdot a\]
\[a = 49:\]
\[100 \cdot a = 100 \cdot 49 = 4900.\]
\[\textbf{б)}\ 281 \cdot a - 81 \cdot a =\]
\[= (281 - 81) \cdot a = 200 \cdot a\]
\[a = 49:\]
\[200 \cdot a = 200 \cdot 49 = 9800.\]
\[\boxed{\mathbf{4}.}\]
\[\textbf{а)}\ 99 \cdot 56 = (100 - 1) \cdot 56 =\]
\[= 100 \cdot 56 - 1 \cdot 56 =\]
\[= 5600 - 56 = 5544\]
\[\textbf{б)}\ 102 \cdot 27 = (100 + 2) \cdot 27 =\]
\[= 100 \cdot 27 + 2 \cdot 27 =\]
\[= 2700 + 54 = 2754\]
\[\boxed{\mathbf{5}.}\]
\[\textbf{а)}\ 7x - 2x + 35 = 100\]
\[5x + 35 = 100\]
\[5x = 100 - 35\]
\[5x = 65\]
\[x = 65\ :5\]
\[x = 13.\]
\[\textbf{б)}\ 4y + 5y - 16 = 56\]
\[9y - 16 = 56\]
\[9y = 56 + 16\]
\[9y = 72\]
\[y = 72\ :9\]
\[y = 8.\]
\[\boxed{\mathbf{6}.}\]
\[Пусть\ x - яблок;\]
\[3x - слив.\]
\[По\ условию:\]
\[x + 3x = 24\]
\[4x = 24\]
\[x = 24\ :4\]
\[x = 6\ (яблок) - в\ коробке.\]
\[3x = 3 \cdot 6 = 18\ (слив) - в\ \]
\[коробке.\]
\[Проверка:\]
\[6 + 18 = 24 - верно.\]
\[Ответ:6\ яблок;18\ слив.\]