B) 1 2 3 По горизонтали По вертикали 4 5 4.3.5. 1. 31:5 4 3 18 2. : 1. 6 7 8 5. 2.4. 2 9 6. .27. 3. 3:3 20 7 70 56 55 7. . 5 28 9 4 6. 1: 8 8 1 1

в)

По горизонтали

1. $$3 \frac{3}{4} \cdot 5 \frac{1}{3} = \frac{15}{4} \cdot \frac{16}{3} = \frac{15 \cdot 16}{4 \cdot 3} = \frac{240}{12} = 20$$
2. $$2 \frac{1}{7} \cdot 4 \frac{2}{3} = \frac{15}{7} \cdot \frac{14}{3} = \frac{15 \cdot 14}{7 \cdot 3} = \frac{210}{21} = 10$$
3. $$\frac{100}{9} \cdot \frac{27}{20} = \frac{100 \cdot 27}{9 \cdot 20} = \frac{2700}{180} = 15$$
4. $$\frac{56}{5} \cdot \frac{55}{28} = \frac{56 \cdot 55}{5 \cdot 28} = \frac{3080}{140} = 22$$
5. $$\frac{9}{5} \cdot \frac{4}{3} = \frac{9 \cdot 4}{5 \cdot 3} = \frac{36}{15} = \frac{12}{5} = 2,4$$

По вертикали

1. $$3 \frac{1}{3} : \frac{5}{18} = \frac{10}{3} : \frac{5}{18} = \frac{10}{3} \cdot \frac{18}{5} = \frac{10 \cdot 18}{3 \cdot 5} = \frac{180}{15} = 12$$
2. $$\frac{21}{2} : 1 \frac{1}{2} = \frac{21}{2} : \frac{3}{2} = \frac{21}{2} \cdot \frac{2}{3} = \frac{21 \cdot 2}{2 \cdot 3} = \frac{42}{6} = 7$$
3. $$\frac{3}{7} : \frac{3}{70} = \frac{3}{7} \cdot \frac{70}{3} = \frac{3 \cdot 70}{7 \cdot 3} = \frac{210}{21} = 10$$
4. $$1 \frac{3}{8} : \frac{1}{8} = \frac{11}{8} : \frac{1}{8} = \frac{11}{8} \cdot 8 = 11$$
5. $$\frac{1}{4} : \frac{1}{100} = \frac{1}{4} \cdot 100 = \frac{100}{4} = 25$$

Заполним кроссворд:

+---+---+---+   +---+---+---+
| 1 | 2 |   |   | 1 | 2 |   |
+---+---+---+   +---+---+---+   +---+---+---+
|   | 0 |   |   |   | 0 |   |   |   | 0 |   |
+---+---+---+   +---+---+---+   +---+---+---+
| 2 | 0 |   |   | 1 | 5 |   |   | 1 | 5 |   |
+---+---+---+   +---+---+---+   +---+---+---+
|   |   |   |   |   |   |   |   |   |   |   |
+---+---+---+   +---+---+---+   +---+---+---+
|   |   |   |   +---+---+---+
| 2 | 2 |   |   | 1 | 1 |   |
+---+---+---+   +---+---+---+   +---+---+---+
|   |   |   |   |   |   |   |   | 2 | 5 |   |
+---+---+---+   +---+---+---+   +---+---+---+
| 2 | , | 4 |   | 2 | , | 4 |   |
+---+---+---+   +---+---+---+   +---+---+---+

Ответ: смотри решение выше