7 grade review

Word problems

100

A rope which is 120m long is divided into three pieces in ratio 3:4:5. Find the length of each piece

30, 40, 50 

200

Bonus

+200p

300

The sum of two numbers is 25 and their difference is 17. Find the numbers.

21 and 4

400

kayrat is three times as old as Sabit. In four years, he will be twice as old as Sabit. How old are Kayrat and Sabit?

Kayrat-12 Sabit-4

500

One number is seven times another numbe. The larger number is 42 more than the smaller number. Find the numbers.

7 and 49

Equation

100

X+3=7

X=4

200

6x-14=4

x=3

300

ex:40e page 12

z=- 1/6

400

6(5x-3)=15

x=1,1

500

7(2x+1)+12=5(2x-2)

X=-29/4

Inequality

100

X-3>6

X>9 

200

2x+5> -1

x>-3

300

Bonus 

+300p

400

The symbol > means

greater than 

500

-2<x+1<3

x€(-3;2)

system of equation

100

Ex: 46a

(x,y)=(2,4)

200

Ex: 46c page 13

(x,y)=(1,3)

300

EX: 46e page:13

(x,y)=(-1,-4)

400

💣

-400p

500

Ex:46f page:13

(x,y)=(5,5)

Home work

100

3/5 * 7/11

21/55

200

2/3 - 7/8=x+2/3

x= - 7/8

300

(- 1/10):3,2 

-1/32

400

x:8/6=21/20

x=7/5

500

Ex: 28a page:11

7/6