Dylan`s Multiplying integer scribe post

Hey every body what well i got or a scribe post today was the odd numbers of pages 296 and 297 so heres the first two


this is what i did for the odd questions on 296
the first one was this

1.Darcy modelled (+7) × (+3) on a number line by drawing seven
arrows. Ishnan modelled (+7) × (+3) on a number line by
drawing only three arrows. Explain Ishnan’s thinking

My answer was this : She is showing 7 groups of 3 which 7x3 really is

The last question on 296 was some what the same and here it is

2.Without doing any calculations, Wei said that -19 and +27 have
the same product as +19 and -27. How did she know?
again my answer was: She knew this because -19 and 19 have the same value but different place values the same goes for 27 and -27

thats what is did for question 5 a

here's question 5 b

the last and final question is the easiest
A) 10x4=40
B) 2x9=18

Carmela's Scribe Post

page 294-295

A: She changed the sign from negative to positive and positive to negative.

A: a.) (-6) x (+2)= (-12)        b.) (+4) x (+4)= 16

A: a.) (+4) x (-7)= (-28)        b.) (+2) x (+9)= 18

Video:

Lloyd's Scribe Post

2. To model (-3) x (-5), Raini places 15 zero pairs on her desk.
a) Why did she use 15 zero pairs?
She used 15 zero pairs because she needed to remove 3 groups of -5.
b) What should she do next? 
She should remove 3 groups of -5.


8. Write each expression as a repeated addition.
a) (+7) x (+2) 2+2+2+2+2+2+2
b) (+4) x (-9) -9+-9+-9+-9


13. Copy and complete each multiplication statement.
a) (+4) x (+6) = (+24)                    b) (+7) x (-2) = (-14)

c) (-1) x (+5) = (-5)                        d) (-8) x (-2) = (+16)


15. An aircraft descends at 3 m/s for 12 s. Use the multiplication of two integers to represent the situation. How far does the aircraft descend?
(+12) x (-3) = (-36)
The aircraft descends 36 m





Here's a video to help you



                            

Rina's Scribe Post

4. Jasmine said that she did not need any integer chips to multiply 0 x (+2) or to multiply (-3) x 0. Explain her thinking. 


That is true because even if you used negative signs or positive signs, as long as there's a 0, you'll still get the answer of 0. About the integer chips, you won't need it. If you used 0 x (+2), that is 0 groups of 2. So then how do you draw "0" groups? You can't. For example, this can't be right:

5. Write each repeated addition as a multiplication.

a) (+1) x (+1) x (+1) x (+1) x (+1) = (+1)

b) (-6) x (-6) = 36

9. What multiplication statement does each set of diagrams represent?

(+2) x (+4) = (+8)

(+2) x (-4) = (-8)

18. Does doubling an integer always result in an integer of greater value? Explain.

Sometimes it can. If it was a negative, it would either go high or less if you saw it being represented on a number line.

Luis' Scribe Post

Tina's Scribepost

Today in class we learned how to model multiplying integers, how to say them in words, and the different types you can multiply by, such as (+)x(+)=(+), (-)x(-)=(+), (+)x(-)=(-), and (-)x(+)=(-). These are the examples in class:

The other example we used in class was....

As you can see there are different ways to also say the multiplication statements for integers.
Here are 4 different questions, but they have 4 different ways to state these questions.

Now here are my 4 questions that I decided to do. I picked each of the different types so hopefully you can understand better. (I will only do the modeling!)
Also if these are very easy numbers, I apologize because I just took the first ones I saw that I haven't done yet.

If you still don't understand click over here!
If you STILL don't understand watch this video!



I hope you understood more about multiplying integers!

Diana's Integer Scribepost

1. 4 x 2= 8

2.4 x (-1)= (-4)

3. (-3) x (-6)= 18

4. (-6) x 3= (-18)

Anthony's Integer Scribe Post

Today in class we learned to model multiplying integers and how to write them out. There's different types to multiple with integers, like this (+) x (+) =, (+) x (-) =, (-) x (+) =, (-) x (-) =.

Here are some examples: 

1.
     

2. 












3.

4.









Here's a video to help you learn more about multiplying integers