Dividing Decimals with Swinging Monkeysmsarnoldmath.weebly.com/.../dividing_decmials_pp.pdf ·...

Dividing Decimals with

Swinging Monkeys

I can fluently divide multi-digit decimals

Dividing Decimals with

Swinging Monkeys

I can fluently divide multi-digit decimals

Swinging Monkeys!

Follow these steps and you will be great at dividing decimals!

Remember: Whatever the OUTSIDE monkeys do – the INSIDE monkeys do also!

Division Vocabulary

64.122.

“Inside” Dividend

“Outside” Divisor

Quotient

Division Vocabulary

64.122.

12.64 ÷ .2

12.64 divided by .2

Steps in Dividing Decimals 1. Make the divisor (outside number) a whole

number by moving (swingin’) the decimal to the right as many places as it takes to make it a WHOLE NUMBER.

2. In MONKEY TERMS: Whatever the outside monkey does (how far it swings) the inside monkey does also. Then the monkey climbs up and sits on the roof!

Swingin’ Monkeys

64.122.Divisor

Moved (swung) the decimal point

1 place to the right Swingin’

Monkey

Steps in Dividing Decimals

2. Move (swing) the decimal point in the dividend the same number of places as the divisor.

64.122. Dividend

Moved (swung) the decimal point 1 place to the right

Steps in Dividing Decimals – Swingin’ Monkeys

64.122.

Steps in Dividing Decimals – Swingin’ Monkeys

64.122.

3. Place (swing) the decimal point in the answer (quotient) lined up with the decimal point in the dividend (on the roof).

Steps in Dividing Decimals

4. Now, divide as usual!

4.1262

Steps in Dividing Decimals

4. Divide the numbers. Make sure the decimal point stays lined up.

4.12626

12 6

2

6 4

3

What is actually happening . . .

n  When you move the decimal one place to the right to create a WHOLE number – you are actually multiplying it by 10!

n  When you move the decimal two places to the right to create a WHOLE number – you are actually multiplying it by 100!

n  Three?

Try these on your own:

1)  14.2 ÷ 0.2 =

2)  -25.5 ÷ 1.5 =

3)  20.46 ÷ -3.3 =

Answers to (1-3)

1)  14.2 ÷ 0.2 = 71

2)  -25.5 ÷ 1.5 = -17

3)  20.46 ÷ - 3.3 = -6.2

Try these on your own:

4) -2.10 ÷ -0.6 5) 5.28 ÷ 4.8 6) -9.52 ÷ 6.8

Try these on your own:

4) -2.10 ÷ -0.6 = 3.5 5) 5.28 ÷ 4.8 = 1.1 6) -9.52 ÷ 6.8 = -1.4

Try these on your own:

7) -32.76 ÷ -0.78 8) 14.56 ÷ 0.28

Try these on your own:

7) -32.76 ÷ -0.78 = -42 8) 14.56 ÷ 0.28 = 52