basic facts.
How do you try to find the LCM and GCF of two numbers?
1.Factor tree
2.Short division
What parts are included in natural number?
0 and positive integers.
Give an example of equivalent fraction.
ANSWERS MAY VARY
list three ratio which can form preportion with
2:7
ANSWERS MAY VARY.
A fish tank measures 5m, 7m, 3m respectively from the length, height and width. What is the volume?
105m3
What is a preportion?
a equation between two ratios.
整除的定义是_________________.
被除数，除数，商都是整数 没有余数
列出三种分数。以及意思
a/b---真分数a<b 假分数a>=b 带分数n+a/b
甲数与乙数比值是20/27,甲数与丙数比值是16/25,乙数与丙数比值是____,甲乙丙之比是____
108：125
80：108：125
一个半径为6的半球叠在一个半径相同的，高为10的圆柱上，体积为________.保留Π
441Π
What are the two fundemental parts of calculating the arc length and area of the sector?
the degree of the center angle and the length of the radius.
What is the difference between prime numbers and composite numbers？
Onli have the factors one and itself.
at least three factors.
有哪些比较分数（有可能包含小数）的方法
1 benchmark fraction
2 通分
3 都转成小数/分数
A B两个建筑队原有水泥重量比是4：3，当A给B54吨水泥时，两队水泥重量比是3：4。A原有水泥___吨。
216
一个斜高5厘米，底边4厘米的正四面锥叠在一个边长4厘米的正方体上，表面积为__________.
120cm2
弧长的两个公式分别是什么？
1.n/180·Πr
2.1/2·lr
235的整除性质
结尾是02468
数字之和是3的倍数
结尾是05
小明和小芳各走一段路，小明走的路比小芳多1/5，小芳用的时间比小明多1/8，他们的速度比是_______.
10:7
A,B,C has 54 yuan in total. A used 3/5 of his money,B used 3/4 of his money,C used 2/3 of his money to buy themselves each a pen the same price. What is the amount of money A and C has left in total?
14 yuan.
小狗被拴在5m长的绳上，绕着2m的正方形框架跑，跑了多长的路？保留Π
5·2·Π·1/4+3·2·Π·1/4+1·2·Π·1/4
=2.5Π+1.5Π+0.5Π
=4.5Πm
1.球的表面积和体积公式是什么？
2.高和半径相等的圆锥、球、圆柱体的体积有什么关系？
1.S=4Πr² 2/3Πr²·h
2.各是圆柱的1/3,2/3,1
List the five most common properties. use letters to show.
Associatve property of add&time a+(b+c)=(a+b)+c
Commutative property of add&time a+b+c=a+c+b
Distributive property of time (a+b)c=ac+bc
Identity property 1a=a 0+a=a
Zero property of time 0a=0
证明循环小数转分数的过程。
x=0.12121212……
100x-x=12
99x=12
x=12/99
小明与小亮同时从A点去B点，同时到达，但小明途中休息的时间是小亮骑车时间的1/3，小亮途中休息的时间是小明骑车时间的1/4，他们的速度比是__________.
9:8
一个长方形水箱长50m宽30cm高10cm，体积为______.放入3升水，水深是______cm.
15m³
2cm.