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МатематикаРешебник по математике 2 класс Моро Часть 1, 2 Часть 2 | Страница 40
Страница 40
\[\boxed{Стр.\ \mathbf{40}\text{.\ \ }\mathbf{ОК\ ГДЗ\ - \ домашка\ на\ 5}}\]
\[Что\ узнали.\ Чему\ научились.\]
\[\boxed{\mathbf{1}.}\]
\[1)\ 32 + 45 =\]
\[= (30 + 40) + (2 + 5) =\]
\[= 70 + 7 = 77\]
\[68 - 43 = 68 - 40 - 3 =\]
\[= 28 - 3 = 25\]
\[54 + 13 = (50 + 10) + (4 + 3) =\]
\[= 60 + 7 = 67\]
\[79 - 56 = 79 - 50 - 6 =\]
\[= 29 - 6 = 23\]
\[2)\ \]
\[3)\]
\[\boxed{\mathbf{2}.}\]
| \[a\] | \[28\] | \[36\] | \[17\] | \[54\] |
|---|---|---|---|---|
| \[a + 9\] | \[37\] | \[45\] | \[26\] | \[63\] |
| \[b\] | \[64\] | \[43\] | \[52\] | \[76\] |
|---|---|---|---|---|
| \[b - 8\] | \[56\] | \[35\] | \[44\] | \[68\] |
\[\boxed{\mathbf{3}.}\]
\[a = 14:\]
\[a + 8 = 14 + 8 = 22.\]
\[a = 8:\]
\[a + 8 = 8 + 8 = 16.\]
\[a = 6:\]
\[a + 8 = 6 + 8 = 14.\]
\[a = 0:\]
\[a + 8 = 0 + 8 = 8.\]
\[b = 13:\]
\[b - 6 = 13 - 6 = 7.\]
\[b = 18:\]
\[b - 6 = 18 - 6 = 12.\]
\[b = 44:\]
\[b - 6 = 44 - 6 = 38.\]
\[b = 50:\]
\[b - 6 = 50 - 6 = 44.\]
\[\boxed{\mathbf{4}.}\]
\[Уравнения,\ решением\ \]
\[которых\ является\ число\ 7.\]
\[15 - x = 8\]
\[x + 40 = 47\]
\[14 - x = 7\]
\[17 - x = 10\]
\[16 - x = 9\]
\[27 - x = 20\]
\[\boxed{\mathbf{5}.}\]
\[21 - 14 = 7\]
\[14 + 7 = 21\]
\[21 - 14 < 8\]
\[8 + 7 > 14\]
\[\boxed{\mathbf{6}.}\]
\[80 - (24 - 6) = 80 - 18 = 62\]
\[90 - (36 - 8) = 90 - 28 = 62\]
\[48 + (13 + 7) = 48 + 20 = 68\]
\[34 + (18 + 2) = 34 + 20 = 54\]
\[89 - (64 - 4) = 89 - 60 = 29\]
\[75 - (37 - 7) = 75 - 30 = 45\]
\[\boxed{\mathbf{7}.}\]
\[8 + 7 - 6 = 15 - 6 = 9\]
\[4 + 9 - 7 = 13 - 7 = 6\]
\[12 - 7 + 9 = 5 + 9 = 14\]
\[16 - 8 + 9 = 8 + 9 = 17\]
\[6 + 6 - 8 = 12 - 8 = 4\]
\[7 + 7 - 5 = 14 - 5 = 9\]
\[\boxed{\mathbf{8}.}\]
\[8 + 4 + 4 = 16\]
\[7 + 9 + 4 = 20\]
\[15 - 7 - 8 = 0\]
\[17 - 7 - 10 = 0\]
\[9 + 0 + 11 = 20\]
\[9 - 9 + 15 = 15\]
\[\boxed{Задание\ на\ полях.\ Ребусы}\]
