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People's education printing plate sixth grade first volume oral calculation questions 100.
2/ 1*2= 1

3/ 1*3= 1

3/2*3=2

3/ 1*6=2

4/3*8=6

5/3*20= 12

7/3* 14=6

8/7*40=35

4/3* 16= 12

9/5*27= 15

2/ 1*30= 15

12/7*24= 14

30/ 1*30= 1

5 1/9* 102= 18

19/9*76=36

4/9*8= 18

5/8*90= 144

Form:

Connect equal formulas (or numbers expressed in letters) with "=".

Equations are divided into equations with unknowns and equations without unknowns.

For example:

X+1= 3-an equation with unknowns;

2+1= 3-an equation without unknowns.

It should be noted that some equations with unknowns have no solutions, but they still have no solutions, such as x+1= x-x.