Начерти ломаную, длину которой можно найти так. 3.2+4=10 (см) 5.8=40 5.7= 3.7=21 7.3= 6.4=24 6.5=

3 ⋅ 2 + 4 = 10 (см)

5 ⋅ 8 = 40

5 ⋅ 7 = 35

3 ⋅ 7 = 21

7 ⋅ 3 = 21

6 ⋅ 4 = 24

6 ⋅ 5 = 30

Ответ: 5*7 = 35, 7*3 = 21, 6*5 = 30