3D SHAPES
Volume of a Cuboid
A cuboid is a 3 dimensional shape.
So to work out the volume we need to know 3 measurements.
So to work out the volume we need to know 3 measurements.
 |
Look at this shape.
There are 3 different measurements:
Height, Width, Length
|
The volume is found using the formula:
Volume = Height × Width × Length
Which is usually shortened to:
V = h × w × l
Or more simply:
V = hwl
In Any Order
It doesn't really matter which one is length, width or height, so long as you multiply all three together.
Example: What is the volume:
 |
The volume is:
4 × 5 × 10 = 200 units3
It also works out the same like this:
10 × 5 × 4 = 200 units3
|
PEMBELAJARAN ABAKUS
進5的口訣~ （背诵的时候只需念“+1+5-4”,
不需要念“=”)
+1=+5-4
+2=+5-3
+3=+5-2
+4=+5-1
退5的口訣~
-1=+4-5
-2=+3-5
-3=+2-5
-4=+1-5
10 進位的口訣~
+9=-1+10
+8=-2+10
+7=-3+10
+6=-4+10
+5=-5+10
+4=-6+10
+3=-7+10
+2=-8+10
+1=-9+10
10 退位的口訣~
-9=-10+1
-8=-10+2
-7=-10+3
-6=-10+4
-5=-10+5
-4=-10+6
-3=-10+7
-2=-10+8
-1=-10+9
混合口訣
~(大九)
+9 =+4-5+10
+8= +3-5+10
+7= +2-5+10
+6= +1-5+10
~(小九)
-9=-10+5-4
-8=-10+5-3
-7=-10+5-2
-6=-10+5-1
* 学生不需要一次过背完全部口诀，而是教师教到有关技能才 指示学生背诵有关口诀 。
Subscribe to:
Posts (Atom)
