Question

помогите пж с 436, 438, 440, 442, даю 25 б

Answer 1

Ответ:

Номер 436

1) 27200

2) 149600

Номер 438

1) 18000

2) 11600

Номер 440

1) 800

2) 390

3) 7880

4) 3088

Номер 442

1) 600

2) 10000

3) 2700

4) 4800

Пошаговое объяснение:

Номер 436

1) Якщо a=4. b=68

$5a \times 20b = 100ab = \\ = 100 \times 4 \times 68 = 27200$

2) Якщо m=22.n=34

$4m \times 50n = 200mn = \\ = 200 \times 22 \times 34 = \\ = 149600$

Номер 438

1) Якщо x=18

$631 \times 18 + x \times 369 = \\ = 11358 + x \times 369 = \\ = 11358 + 18 \times 369 = \\ = 11358 + 6642 = \\ = 18000$

2) Якщо a=1024

$58a - 58 \times 824 = \\ = 58a - 47792 = \\ = 58 \times 1024 - 47792 = \\ = 59392 - 47792 = \\ = 11600$

Номер 440

1) Якщо x=8

$34x + 66x = x(34 + \\ + 66) = \\ = 100x = \\ = 100 \times 8 = \\ = 800$

2) Якщо a=26

$54a - 39a = a(54 - \\ - 39) = \\ = 15a = \\ = 15 \times 26 = \\ = 390$

3) Якщо m=394

$18m - 5m + 7m = \\ = 20m = \\ = 20 \times 394 = \\ = 7880$

4)

$19z - 12z + 33z - 192 = \\ = 40z - 192 = \\ = 40 \times 82 - 192 = \\ = 3280 - 192 = \\ = 3088$

Номер 442

1)

$25 \times 4 \times 6 = 100 \times 6 = \\ = 600$

2)

$125 \times 25 \times 32 = \\ = 3125 \times 32 = \\ = 100000$

3)

$75 \times 36 = 2700$

4)

$96 \times 50 = 4800$