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Tuesday, May 20, 2014

Sound explanation template

If you shut the door you will make sound waves. You cant see it because it goes really fast. In water the level of speed is 344.4 meters per second. In air it is 330 meters/seconds. However the actual speed is depending on the temperature and to a lesser degree. It starts from a vibration which travels to your ears. Sound waves are reflected off walls when sound are made in a room. The way that sound travels in a room is called acoustics.


When a sound source travels towards you, the sound raise in pitch when the sound source travel away from you, the sound lowers in pitch. This is known as the Doppler effect. A thin piece of skin inside your ear. Sound waves make vibrate and your brain detect this movement as sound.


Pitch describes how high or low a note is. A high note has a low pitch. The Sound waves are vibrating.
Echoes are sound that have bounced off a hard surface and heard after the first sound has been made
Vibration is when something moves backwards and forwards very quickly it is said to be a vibration
Sound waves that have very high pitch. The sound is so high that humans cannot hear it.
An instrument used by doctors to listen to the sound in your body that you can’t usually hear, such as your heartbeat.
The Way in which ships and some animals bounce sound off objects to get a picture of their surroundings.




Thursday, May 8, 2014

Logan Simeon Add/Sub Yr 7-1 WALT solve addition problems with tenths by changing one number into a whole number.

25+39=64                                Maths work.png
25-01=24
39+01=40
24+40=64
46+18=65
46-02=48                                          maths work 2.png
18+02=20
20+48=68


31+63=96
31-01=32
64+01=64
64+32=96


28+2.5=5.3   
28+02=30
25-02=23
30+23=53


48+67=115
48+02=50
67-02=65
50+65=115


137+45=182
137+03=140
45-03=42
14.0+42=182


99+46=145
99+01=1.0
46-01=45
100+45=145


6.6+88=154
88+02=90
66-02=64
90+64=154 

4.2+5.8=10.0
58+.2=60
42-2=40
60+40+100


73+75=148
75+03=78
73-3=70
70+78=148


111+68=179
68+01=69
111-01=110
110+69=179


5.8+9.3=15.1
5.8+0.2=6.0
9.3-0.2=9.1
9.1+6.0=15.1


7.2+8.4=15.6
8.4+0.2=8.6
7.2-0.2=7.0
7.0+8.6=15.6


13.5+8.9=22.4
8.9+0.1=9.0
13.5-0.1=13.4
13.4+9.0=22.4


6.5+8.1=14.6
8.1+0.5=8.6
6.5-0.5=6.0
6.0+8.6=14.6


9.3+7.4=16.7
7.4+0.3=7.7
9.3-0.3=9.0
7.7+9.0=16.7



6.7+8.3=15.0
8.3+0.7=9.0
6.7-0.7=6.0
9.0+6.0=15.0


4.8+12.3=17.1
4.8+0.2=5.0
123-02=121
121+50=171


77+26=103
77+03=80
26-03=23
80+23=103


124+129=253
129+01=130
124-01=123
123+130=253



Tuesday, May 6, 2014

Math master


A diagram to show my thinking...
Maths.png
4 other similar questions...

Strategy I used to solve it...

1. 650+ 300=950
600+300=900
50 + 900 950

2. 500+210=710
500+200=700
700+10=710

3. 590+200=890
500+200=800
90 + 800= 890

4. 400+456= 856
400+400=800
800+56=856

The answers is 160. How I got it? I  take away the 1 from the 101 and then I put  the 1 to the 59 then its 60. then I added 60 to the 100. then the answers is 160

What is 59+ 101?

Logan Had 25 lollies he had 4 friends to share it with how many lollies did he have to give to his friends?
He had to give 5 lollies each, 5 for Jonathan, 5 for Auri, 5 for Cavin and 5 for Hala the Answer is 5.

A word story problem I have written...