Математика 6 класс

Упражнение 1160

Условие:

Вычислите устно:

6L1160z1

 

 

 

 

 

 

 

 

 

 

 

Ответ:

а) 1/2 : 1/4 = 2, 2 3/4 : 1/4 = 11, 1 : 1/4 = 4, 5/16 : 1/4 = 1 1/4,
1/8 : 1/4 = 1/2, 3/4 : 1/4 = 3, 2 : 1/4 = 8, 1/4 : 1/4 = 1;

б) -1/2 + 1/6 = -1/3; 1/3 + 1/6 = 1/2, -1/12 + 1/6 = 1/12, -1 + 1/6 = -5/6,
5/12 + 1/6 = 7/12, -1/3 + 1/6 = 1/6, 1/2 + 1/6 = 2/3, -1/6 + 1/6 = 0.

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