Стр.103 Часть 1 ГДЗ Башмаков Нефедова 4 класс (Математика)

Задача

3. Выполни вычисления письменно.
а) $$75\,459+763$$
$$69\,306+58\,094$$
$$370\,584+99\,247$$
$$783\,496+476\,319$$
б) $$64\,753-25\,691$$
$$805\,600-4\,780$$
$$712\,600-65\,358$$
$$400\,246-315\,907$$
в) $$8\,238\cdot5$$
г) $$7\,090\cdot6$$
д) $$5\,600\cdot4$$
е) $$9\,030\cdot20$$
$$4\cdot34\,548$$
$$90\,052\cdot8$$
$$8\,367\cdot600$$
$$450\cdot500$$
$$39\,658\cdot9$$
$$4\cdot72\,304$$
$$50\cdot34\,065$$
$$41\,200\cdot30$$
$$199\,312\cdot7$$
$$9\cdot208\,050$$
$$378\cdot5\,000$$
$$3\,800\cdot600$$
4. Найди значение выражений.
а) $$200\cdot450-50\,000$$
$$28\,000:7\,000\cdot12\,000-40\,000$$
$$16\,000:4+47\,000$$
$$18\,000-(300\cdot70-3\,000)$$
б) $$26\,624:4-(43\cdot20+708+199):3$$
$$31\,405\cdot7+(18\,758-93):5$$
$$(1\,820-9\cdot8-76+9\,383-315-548\cdot7):4$$
$$15\,290:5+(10\,890-51+36\,616-27\cdot10-154)\cdot7$$
5. Найди неизвестное число.
а) $$2\,109+x=15\,000$$
$$y-954=32\,405$$
$$85\,360-z=7\,800$$
$$k+5\,062=11\,203$$
б) $$m-(647-138)=2\,380$$
$$6\,000-(n+495)=4\,730$$
$$5\,682+7\,387-p=6\,050$$
$$r+1\,908+13\,700=46\,302$$
в) $$9\cdot u=3\,150$$
$$v\cdot70=87\,360$$
$$f:5=6\,057$$
г) $$(d-389)\cdot3=807$$
$$8\cdot(5\,400-s)=5\,536$$
$$45\,240:w=60$$
$$t:(6\,400-6\,393)=8\,500$$
$$(119+h):8=765$$

Подробный ответ

а) $$75\,459 + 763 = 76\,222$$
$$69\,306 + 58\,094 = 127\,400$$
$$370\,584 + 99\,247 = 469\,831$$
$$783\,496 + 476\,319 = 1\,259\,815$$

б) $$64\,753 — 25\,691 = 39\,062$$
$$805\,600 — 4\,780 = 800\,820$$
$$712\,600 — 65\,358 = 647\,242$$
$$400\,246 — 315\,907 = 84\,339$$

в) $$8238 \cdot 5 = 41\,190$$
$$4 \cdot 34\,548 = 138\,192$$
$$39\,658 \cdot 9 = 356\,922$$
$$199\,312 \cdot 7 = 1\,395\,184$$

г) $$7090 \cdot 6 = 42\,540$$
$$90\,052 \cdot 8 = 720\,416$$
$$4 \cdot 72\,304 = 289\,216$$
$$9 \cdot 208\,050 = 1\,872\,450$$

д) $$5600 \cdot 4 = 22\,400$$
$$8367 \cdot 600 = 5\,020\,200$$
$$50 \cdot 34\,065 = 1\,703\,250$$
$$378 \cdot 5000 = 1\,890\,000$$

е) $$9030 \cdot 20 = 180\,600$$
$$450 \cdot 500 = 225\,000$$
$$41\,200 \cdot 30 = 1\,236\,000$$
$$3800 \cdot 600 = 2\,280\,000$$

а) $$200 \cdot 450 — 50\,000 = 40\,000$$
$$16\,000 : 4 + 47\,000 = 51\,000$$
$$28\,000 : 7000 \cdot 12\,000 — 40\,000 = 8000$$
$$18\,000 — (300 \cdot 70 — 3000) = 0$$

б) $$26\,624 : 4 — (43 \cdot 20 + 708 + 199) : 3 = 6067$$
$$31\,405 \cdot 7 + (18\,758 — 93) : 5 = 223\,568$$
$$\bigl(1820 — 9 \cdot 8 — 76 + 9383 — 315 — 548 \cdot 7\bigr) : 4 = 34\,049$$
$$15\,290 : 5 + (10\,890 — 51 + 36\,616 — 27 \cdot 10 — 154) \cdot 7 = 332\,275$$

а) $$2109 + x = 15\,000$$
$$x = 15\,000 — 2109 = 12\,891$$

$$y — 954 = 32\,405$$
$$y = 32\,405 + 954 = 33\,359$$

$$85\,360 — z = 7800$$
$$z = 85\,360 — 7800 = 77\,560$$

$$k + 5062 = 11\,203$$
$$k = 11\,203 — 5062 = 6141$$

б) $$m — (647 — 138) = 2380$$
$$m — 509 = 2380$$
$$m = 2380 + 509 = 2889$$

$$6000 — (n + 495) = 4730$$
$$n + 495 = 6000 — 4730 = 1270$$
$$n = 1270 — 495 = 775$$

$$5682 + 7387 — p = 6050$$
$$13\,069 — p = 6050$$
$$p = 13\,069 — 6050 = 7019$$

$$r + 1908 + 13\,700 = 46\,302$$
$$r + 15\,608 = 46\,302$$
$$r = 46\,302 — 15\,608 = 30\,694$$

в) $$9 \cdot u = 3150$$
$$u = 3150 : 9 = 350$$

$$v \cdot 70 = 87\,360$$
$$v = 87\,360 : 70 = 1248$$

$$45\,240 : w = 60$$
$$w = 45\,240 : 60 = 754$$

$$f : 5 = 6057$$
$$f = 6057 \cdot 5 = 30\,285$$

г) $$(d — 389) \cdot 3 = 807$$
$$d — 389 = 807 : 3 = 269$$
$$d = 269 + 389 = 658$$

$$8 \cdot (5400 — s) = 5536$$
$$5400 — s = 5536 : 8 = 692$$
$$s = 5400 — 692 = 4708$$

$$t : (6400 — 6393) = 8500$$
$$t : 7 = 8500$$
$$t = 8500 \cdot 7 = 59\,500$$

$$\left(119 + h\right) : 8 = 765$$
$$119 + h = 765 \cdot 8 = 6120$$
$$h = 6120 — 119 = 6001$$

Ответ

3) а) 76 222; 127 400; 469 831; 1 259 815. б) 39 062; 800 820; 647 242; 84 339. в) 41 190; 138 192; 356 922; 1 395 184. г) 42 540; 720 416; 289 216; 1 872 450. д) 22 400; 5 020 200; 1 703 250; 1 890 000. е) 180 600; 225 000; 1 236 000; 2 280 000.

4) а) 40 000; 51 000; 8000; 0. б) 6067; 223 568; 34 049; 332 275.

5) а) $$x=12\,891$$, $$y=33\,359$$, $$z=77\,560$$, $$k=6141$$; б) $$m=2889$$, $$n=775$$, $$p=7019$$, $$r=30\,694$$; в) $$u=350$$, $$v=1248$$, $$w=754$$, $$f=30\,285$$; г) $$d=658$$, $$s=4708$$, $$t=59\,500$$, $$h=6001$$.