Question

пж ответ дам 10баллов​

Answer 1

Ответ:

(80+1)×(40+3)=3 483

(40+8)×(10+2)=576

(30+2)×(50+2)=1664

(40+4)×(60+5)=2860

(50+6)×(10+5)=840

Answer 2

Ответ:

1) 770

2) 3483

3) 512

4) 1664

5) 2860

6) 820

Пошаговое объяснение:

1)

$22 \times 35 = (20 + 2) \times \\ \times (30 + 5) = \\ = 20 \times 30 + 20 \times 5 + 2 \times 30 + 2 \times 5 = \\ = 600 + 100 + 60 + 10 = \\ = 770$

2)

$81 \times 43 = \\ = (80 + 1) \times (40 + 3) = \\ = 80 \times 40 + 80 \times 3 + 1 \times 40 + 1 \times 3 = \\ = 3200 + 240 + 40 + 3 = \\ = 3483$

3)

$48 \times 12 = \\ = (40 + 8) \times (10 + 2) = \\ = 40 \times 10 + 40 \times 2 + 8 \times 2 + 8 \times 2 = \\ = 512$

4)

$32 \times 52 = \\ = (30 + 2) \times (50 + 2) = \\ = 30 \times 50 + 30 \times 2 + 2 \times 50 + 2 \times 2 = \\ = 1664$

5)

$44 \times 65 = \\ = (40 + 4) \times (60 + 5) = \\ = 40 \times 60 + 40 \times 5 + 4 \times 60 + 4 \times 5 = \\ = 2860$

6)

$56 \times 15 = \\ = (50 + 6) \times (10 + 5) = \\ = 50 \times 10 + 50 \times 5 + 6 \times 10 + 6 \times 5 = \\ = 820$