2.4+ 5.6*(13 3/4-12 13/14) =

Question

2.4+ 5.6*(13 3/4-12 13/14) =

Comments

(13?3/4-12?13/14

Answer 1

13 3/4 представим как 12 7/4 и приведем дроби к общему знаменателю
12 49/28 - 12 26/28 = 23/28;
5.6 = 56/10 • 23/28 = 46/10 = 4.6;
2.4 + 4.6 = 7