Упр.72 Часть 2 ГДЗ Рабочая тетрадь Истомина 4 класс (Математика)

Совет дня! Поиск по сайту решак.ру может помочь найти другой похожий топик из других учебных изданий. Таким образом, можете скомпоновать их разные части и получить уникальный ответ на задание.

Вычислим значения выражений при данных значениях букв и заполним таблицы.

Таблица 1.

При $$a=1$$:

$$ a \cdot 2 = 1 \cdot 2 = 2 \\ 3 \cdot a + 10 = 3 \cdot 1 + 10 = 13 \\ 5 \cdot a — 1 = 5 \cdot 1 — 1 = 4 \\ a \cdot 2 + a \cdot 3 = 1 \cdot 2 + 1 \cdot 3 = 5 $$

При $$a=2$$:

$$ a \cdot 2 = 2 \cdot 2 = 4 \\ 3 \cdot a + 10 = 3 \cdot 2 + 10 = 16 \\ 5 \cdot a — 1 = 5 \cdot 2 — 1 = 9 \\ a \cdot 2 + a \cdot 3 = 2 \cdot 2 + 2 \cdot 3 = 10 $$

При $$a=3$$:

$$ a \cdot 2 = 3 \cdot 2 = 6 \\ 3 \cdot a + 10 = 3 \cdot 3 + 10 = 19 \\ 5 \cdot a — 1 = 5 \cdot 3 — 1 = 14 \\ a \cdot 2 + a \cdot 3 = 3 \cdot 2 + 3 \cdot 3 = 15 $$

При $$a=4$$:

$$ a \cdot 2 = 4 \cdot 2 = 8 \\ 3 \cdot a + 10 = 3 \cdot 4 + 10 = 22 \\ 5 \cdot a — 1 = 5 \cdot 4 — 1 = 19 \\ a \cdot 2 + a \cdot 3 = 4 \cdot 2 + 4 \cdot 3 = 20 $$

При $$a=5$$:

$$ a \cdot 2 = 5 \cdot 2 = 10 \\ 3 \cdot a + 10 = 3 \cdot 5 + 10 = 25 \\ 5 \cdot a — 1 = 5 \cdot 5 — 1 = 24 \\ a \cdot 2 + a \cdot 3 = 5 \cdot 2 + 5 \cdot 3 = 25 $$

При $$a=6$$:

$$ a \cdot 2 = 6 \cdot 2 = 12 \\ 3 \cdot a + 10 = 3 \cdot 6 + 10 = 28 \\ 5 \cdot a — 1 = 5 \cdot 6 — 1 = 29 \\ a \cdot 2 + a \cdot 3 = 6 \cdot 2 + 6 \cdot 3 = 30 $$

При $$a=7$$:

$$ a \cdot 2 = 7 \cdot 2 = 14 \\ 3 \cdot a + 10 = 3 \cdot 7 + 10 = 31 \\ 5 \cdot a — 1 = 5 \cdot 7 — 1 = 34 \\ a \cdot 2 + a \cdot 3 = 7 \cdot 2 + 7 \cdot 3 = 35 $$

При $$a=8$$:

$$ a \cdot 2 = 8 \cdot 2 = 16 \\ 3 \cdot a + 10 = 3 \cdot 8 + 10 = 34 \\ 5 \cdot a — 1 = 5 \cdot 8 — 1 = 39 \\ a \cdot 2 + a \cdot 3 = 8 \cdot 2 + 8 \cdot 3 = 40 $$

При $$a=9$$:

$$ a \cdot 2 = 9 \cdot 2 = 18 \\ 3 \cdot a + 10 = 3 \cdot 9 + 10 = 37 \\ 5 \cdot a — 1 = 5 \cdot 9 — 1 = 44 \\ a \cdot 2 + a \cdot 3 = 9 \cdot 2 + 9 \cdot 3 = 45 $$

Таблица 2.

При $$b=30$$:

$$ b-3 = 30-3 = 27 \\ b:3-1 = 30:3-1 = 10-1 = 9 \\ (b+1)\cdot 3 = (30+1)\cdot 3 = 93 \\ 20+3\cdot b = 20+3\cdot 30 = 110 $$

При $$b=60$$:

$$ b-3 = 60-3 = 57 \\ b:3-1 = 60:3-1 = 20-1 = 19 \\ (b+1)\cdot 3 = (60+1)\cdot 3 = 183 \\ 20+3\cdot b = 20+3\cdot 60 = 200 $$

При $$b=90$$:

$$ b-3 = 90-3 = 87 \\ b:3-1 = 90:3-1 = 30-1 = 29 \\ (b+1)\cdot 3 = (90+1)\cdot 3 = 273 \\ 20+3\cdot b = 20+3\cdot 90 = 290 $$

При $$b=120$$:

$$ b-3 = 120-3 = 117 \\ b:3-1 = 120:3-1 = 40-1 = 39 \\ (b+1)\cdot 3 = (120+1)\cdot 3 = 363 \\ 20+3\cdot b = 20+3\cdot 120 = 380 $$

При $$b=150$$:

$$ b-3 = 150-3 = 147 \\ b:3-1 = 150:3-1 = 50-1 = 49 \\ (b+1)\cdot 3 = (150+1)\cdot 3 = 453 \\ 20+3\cdot b = 20+3\cdot 150 = 470 $$

При $$b=180$$:

$$ b-3 = 180-3 = 177 \\ b:3-1 = 180:3-1 = 60-1 = 59 \\ (b+1)\cdot 3 = (180+1)\cdot 3 = 543 \\ 20+3\cdot b = 20+3\cdot 180 = 560 $$

При $$b=210$$:

$$ b-3 = 210-3 = 207 \\ b:3-1 = 210:3-1 = 70-1 = 69 \\ (b+1)\cdot 3 = (210+1)\cdot 3 = 633 \\ 20+3\cdot b = 20+3\cdot 210 = 650 $$

При $$b=240$$:

$$ b-3 = 240-3 = 237 \\ b:3-1 = 240:3-1 = 80-1 = 79 \\ (b+1)\cdot 3 = (240+1)\cdot 3 = 723 \\ 20+3\cdot b = 20+3\cdot 240 = 740 $$

При $$b=270$$:

$$ b-3 = 270-3 = 267 \\ b:3-1 = 270:3-1 = 90-1 = 89 \\ (b+1)\cdot 3 = (270+1)\cdot 3 = 813 \\ 20+3\cdot b = 20+3\cdot 270 = 830 $$

Таблица 3.

При $$c=120$$:

$$ c:2 = 120:2 = 60 \\ c:3-22 = 120:3-22 = 40-22 = 18 \\ c:6 = 120:6 = 20 \\ c:6-13 = 120:6-13 = 20-13 = 7 $$

При $$c=150$$:

$$ c:2 = 150:2 = 75 \\ c:3-22 = 150:3-22 = 50-22 = 28 \\ c:6 = 150:6 = 25 \\ c:6-13 = 150:6-13 = 25-13 = 12 $$

При $$c=180$$:

$$ c:2 = 180:2 = 90 \\ c:3-22 = 180:3-22 = 60-22 = 38 \\ c:6 = 180:6 = 30 \\ c:6-13 = 180:6-13 = 30-13 = 17 $$

При $$c=210$$:

$$ c:2 = 210:2 = 105 \\ c:3-22 = 210:3-22 = 70-22 = 48 \\ c:6 = 210:6 = 35 \\ c:6-13 = 210:6-13 = 35-13 = 22 $$

При $$c=240$$:

$$ c:2 = 240:2 = 120 \\ c:3-22 = 240:3-22 = 80-22 = 58 \\ c:6 = 240:6 = 40 \\ c:6-13 = 240:6-13 = 40-13 = 27 $$

При $$c=270$$:

$$ c:2 = 270:2 = 135 \\ c:3-22 = 270:3-22 = 90-22 = 68 \\ c:6 = 270:6 = 45 \\ c:6-13 = 270:6-13 = 45-13 = 32 $$

При $$c=300$$:

$$ c:2 = 300:2 = 150 \\ c:3-22 = 300:3-22 = 100-22 = 78 \\ c:6 = 300:6 = 50 \\ c:6-13 = 300:6-13 = 50-13 = 37 $$

При $$c=330$$:

$$ c:2 = 330:2 = 165 \\ c:3-22 = 330:3-22 = 110-22 = 88 \\ c:6 = 330:6 = 55 \\ c:6-13 = 330:6-13 = 55-13 = 42 $$

При $$c=360$$:

$$ c:2 = 360:2 = 180 \\ c:3-22 = 360:3-22 = 120-22 = 98 \\ c:6 = 360:6 = 60 \\ c:6-13 = 360:6-13 = 60-13 = 47 $$

Ответ

Таблицы заполнены верно.