Proportion of circle______ It's called the area of a circle

Proportion of circle______ It's called the area of a circle

According to the analysis, the size of the plane occupied by the circle is called the area of the circle

Seeking ratio and simplifying ratio of grade 6
(1) calculate the ratio
3.2∶4 3 ：5/7 25% ：2
(2) Simplification ratio
100 ：25 6 ：0.06 2/3 ：2/9
The process needs to be written

1）3.2:4 3:(5/7) 25%:2
=32/40 =21：5 =0.25/2
=4/5.=1/8.
2)100:25 6:0.06 (2/3):(2/9)
=4:1.=600/6 =（6/9）):(2/9)
=100:1 =3:1

Three questions simplify the evaluation
When m = 10, find the value of 1.35m-8-m divided by 4. When x = 10, find the value of 1.5x + 4 (0.5x-2.4). When x = 8, find the value of 0.5 (30x + 5) - x divided by 2. When x = 7, y = 5, find the value of 4X + 12y-2 (5y-3x). There is no multiplication sign above. It's all the English letter X. because the division sign can't be typed, we use Chinese characters instead. We'll hand it in tomorrow. OK, the format should be the same

1、 1.35m-8-m = 0.35m-8 = 0.35 * 10-8 = 3.5-8 = - 4.5
2、 1.5x + 4 (0.5x-2.4) = 1.5x + 2x-9.6 = 35-9.6 = 25.4
3、 = 15x + 0.25-x / 2 = 14.5x-0.25 = 11.35
4、 = 4x + 12y-10y + 6x = 10x + 2Y = 70 + 10 = 80

How to simplify 18 out of 25 math problems in Grade 5 of primary school

There is no least common multiple, there is no way to simplify