User:School of arithmetic

Multiplication
Example

$$2+2+2=3\times{2}=6$$

Ex.1.1

$$1+1=$$

$$2+2+2=$$

$$3+3+3=$$

$$4+4+4+4+4=$$

$$5+5+5+5+5+5=$$

Example

$$3\times{4}=4+4+4=12$$

ex.1.2

$$2\times{4}=$$

$$3\times{4}=$$

$$5\times{3}=$$

$$10\times{3}=$$

$$7\times{2}=$$

$$6\times{4}=$$

Multiplying by 10 and 100
Examples

$$3\times{10}=30$$

$$3\times{100}=300$$

Ex.1.3

$$2\times{10}$$

$$8\times{10}$$

$$12\times{10}$$

$$10\times{10}$$

$$2\times{100}$$

$$23\times{100}$$

$$20\times{100}$$

$$11\times{100}$$

Multiplication by zero
Example

$$5\times{0}=0$$

Note: Any number multiply by zero is zero!

Ex.1.4

$$6\times{0}=$$

$$60\times{0}=$$

$$34\times{0}=$$

Multiplication by 1
Example

$$23\times{1}=23$$

Note: Any number multiply by 1 is always 1!

Ex.1.5

$$34\times{1}=$$

$$134\times{1}=$$

$$1\times{1}=$$

$$3\times{1}=$$