SITI NUR FATIMAH(A410112003)

NUMBER

NUMBER

—·—·—·—·—·—·—·—·—·—·—·—·—·—·—·— -7 -6 -5 - 4 -3 -2 -1 0 1 2 3 4 5 6 7

Negative integer Number Positive Integer Number

Zero

Bilangan Cacah

Summation and Reduction Two Integer

1 Forward-Backward

2. Arrows 1

3. Arrows 2

number line model approach (Model garis

bilangan) :

Summation and Reduction Two Integer? (Approach models the number line Forward and Backward)

Integer Number

positive Advance

nol Fixed

negatif go back

Operation+ Next

- Reserve direction

10-1 2-2 3-3 4-4 5-5

Calculate 2 + 3

3

So, 2 + 3 = 5

2

10-1 2-2 3-3 4-4 5-5

Calculate 2 + (–3)

– 3

So, 2 + (–3) = –1

2

10-1 2-2 3-3 4-4 5-5

Calculate –2 + 3

3

So, – 2 + 3 = 1

-2

10-1 2-2 3-3 4-4 5-5

Calculate –2 + (– 3)

– 3

So, – 2 + (– 3) = – 5

-2

10-1 2-2 3-3 4-4 5-5

Calculate 2 – 3

2

3

Soi, 2 – 3 = –1

10-1 2-2 3-3 4-4 5-5

3

Jadi, 2 – (– 3 ) = 5

2

Calculate 2 – (–3)

Summation and reduction Two Intefer?Approach Models the Number Line Arrows-1

Integer number

positive Direction to the right

Zero Fixed

negative Direction to the left

Operation

+ Continued

- Converted to add to operation

Operation Value

Judging from the base point 1 to arrowhead-2 (see below number arrowhead)

10-1 2-2 3-3 4-4 5-5

So, 2 + 3 = 5

Calculate 2 + 3

10-1 2-2 3-3 4-4 5-5

So, -2 + 3 = 1

Calculate -2 + 3

10-1 2-2 3-3 4-4 5-5

So, 2 3 = 1

Calculate 2 3

Calculate 2 + (3)

The Approach Uses a Number line Agreement That:

The operation is used addition operation.If you found a

reduction in the technical operation should be converted

first into a summation operation with the opponent.Means

the summation operation is continued.

Summation and Reduction two integers

(Approach models the number linae arrows-2)

The first term is the first point is placed on the number line (as a

starting point an arrow) then just continued with the second term

in accordance with the type of number is. If the second term

positive numbers, draw an arrow to the right as far as the amount

of his number. If the second term negative numbers, draw an

arrow to the left as far as the amount of his number.

By Adi Wijaya

10-1 2-2 3-3 4-4 5-5

So, 2 + 3 = 5

Calculate 2 + 3

By Adi Wijaya

10-1 2-2 3-3 4-4 5-5

So, 2 + 3 = 1

Calculate 2 + 3

10-1 2-2 3-3 4-4 5-5

So, 2 3 = 1

Calculate 2 3

Calculate 2 + (3)

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