(5,4-2 1/3)÷7 2/3; (2 1/3+0,25)×0,12; (7,6-4 3/4)÷1,9

Question

(5,4-2 1/3)÷7 2/3; (2 1/3+0,25)×0,12; (7,6-4 3/4)÷1,9

Answer 1

(5,4-2 1/3)÷7 2/3=(5 4/10-2 1/3)÷7 2/3= (5-2)(4/10-1/3)=3 2/30=3 1/15÷7 2/3= 46/15÷23/3= 46/15×3/23=2/5