LESSON 2: Multiply the following Examples: Do these:

$$314 \times 4 = 1256$$

The missing number is $\boxed{\text{1256}}$.

2)

$$176 \times 9 = 1584$$

The missing number is $\boxed{\text{1584}}$.

3)

$$187 \times 5 = 935$$

The missing number is $\boxed{\text{935}}$.

4)

$$180 \times 4 = 720$$

The missing number is $\boxed{\text{720}}$.

5)

$$250 \times 3 = 750$$

The missing number is $\boxed{\text{750}}$.

6)

$$170 \times 8 = 1360$$

The missing number is $\boxed{\text{1360}}$.

7)

$$139 \times 3 = 417$$

The missing number is $\boxed{\text{417}}$.

8)

$$280 \times 3 = 840$$

The missing number is $\boxed{\text{840}}$.

9)

$$342 \times 12 = 4104$$

The missing number is $\boxed{\text{4104}}$.

10)

$$143 \times 8 = 1144$$

The missing number is $\boxed{\text{1144}}$.