[tex]1) \frac{12-15}{15}:\frac{400-440}{440} =2,2[/tex]
[tex]2) \frac{11-12}{12}: \frac{380-400}{400} = 1,6[/tex]
[tex]3) \frac{7-11}{11} : \frac{320-380}{380}= 2,3[/tex]
[tex]4) \frac{4-7}{7} : \frac{288-320}{320} =4,3[/tex]
[tex]2) \frac{11-12}{12}: \frac{380-400}{400} = 1,6[/tex]
[tex]3) \frac{7-11}{11} : \frac{320-380}{380}= 2,3[/tex]
[tex]4) \frac{4-7}{7} : \frac{288-320}{320} =4,3[/tex]
Answers & Comments
1)(12-15):15:((400-440):440)=2.2
-3:15:(-40:440)=2.2
-0.2:(-1/11)=2.2
0.2*11=2.2
2.2=2.2
чтд
2)(11-12):12:((380-400):400)=1.6
-1/12:(-20:400)=1.6
-1/12:(-1/20)=1.6
1/12*20=1.6
1 2/3=1.6-неверно
3)(7-11):11:((320-380):380)=2.3
-4/11:(-60:380)=2.3
4/11*19/3=2.3
2 10/33=2.3-неверно
4)-3:7:(-32:320)=4.3
-3/7:(-0.1)=4.3
3/7*10=4.3
4 2/7=4.3-неверно