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МатематикаРешебник по математике 4 класс Кремнева рабочая тетрадь Часть 1, 2 Часть 1 | Страница 24
Страница 24
\[\boxed{\mathbf{Страница}\mathbf{\ 24}\mathbf{.}\mathbf{\ }Еуроки\ - \ ДЗ\ без\ мороки}\]
\[\boxed{\mathbf{29}\mathbf{.}\mathbf{\ }}\]
| \[d\] | \[230\] | \[150\] | \[600\] | \[40\] | \[700\] | \[60\] | \[70\] |
|---|---|---|---|---|---|---|---|
| \[c\] | \[20\] | \[300\] | \[100\] | \[300\] | \[100\] | \[40\] | \[6\] |
| \[d \cdot c\] | \[4600\] | \[45\ 000\] | \[60\ 000\] | \[12\ 000\] | \[70\ 000\] | \[2400\] | \[420\] |
\[\boxed{\mathbf{30}\mathbf{.}\mathbf{\ }}\]
\[(84\ :28 \cdot 16 + 36)\ :21 =\]
\[= (48 + 36)\ :21 = 84\ :21 = 4\]
\[(16 \cdot 4 + 17)\ :27 \cdot 32 =\]
\[= (64 + 17)\ :27 \cdot 32 =\]
\[= 81\ :27 \cdot 32 = 3 \cdot 32 = 96\]
\[(85\ :5 + 73)\ :15 - 6 =\]
\[= (17 + 73)\ :15 - 6 =\]
\[= 90\ :15 - 6 = 6 - 6 = 0\]
\[(13 \cdot 5 + 19)\ :6 + 13 =\]
\[= (65 + 19)\ :6 + 13 =\]
\[= 84\ :6 + 13 = 14 + 13 = 27\]
\[14 \cdot 4 = 56\]
\[29 \cdot 3 = 87\]
\[16 \cdot 6 = 96\]
\[25 \cdot 3 = 75\]
\[\boxed{\mathbf{31}\mathbf{.}\mathbf{\ }}\]
\[7030,\ 7800,\ 7011,\ 7300,\ 7830,\ \]
\[7811,\ 7330,\ 7311,\ \]
\[2030,\ 2800,\ 2011,\ 2300,\ 2830,\ \]
\[2811,\ 2330,\ 2311.\]
\[\boxed{\mathbf{32}\mathbf{.}\mathbf{\ }}\]
\[800 + 120 - 860 + 920 =\]
\[= 920 - 860 + 920 =\]
\[= 60 + 920 = 980\]
\[720 - 290 + 570 - 650 =\]
\[= 1290 - 290 - 650 =\]
\[= 1000 - 650 = 350\]
\[960 - 490 + 330 - 580 =\]
\[= 1290 - 490 - 580 =\]
\[= 800 - 580 = 220\]
\[312\ :156 = 2\]
\[918\ :102 = 9\]
\[504\ :168 = 3\]
\[\boxed{\mathbf{33}\mathbf{.}\mathbf{\ }}\]
\[300 \cdot 50 + 200 + 9 =\]
\[= 15\ 000 + 200 + 9 = 15\ 209\]
\[300 \cdot 50 + (200 - 9) =\]
\[= 15\ 000 + 191 = 15\ 191\]
