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Ex 31,urgență!!!Mâine am mate

Ex 31urgențăMâine Am Mate class=

Răspuns :

( h : 5 - 5 ) × 9 + 186 : 6 = 400 : 10
( h : 5 - 5 ) × 9 + 31 = 40
( h : 5 - 5 ) × 9 = 40 - 31
( h : 5 - 5 ) × 9 = 9
h : 5 - 5 = 9 : 9
h : 5 - 5 = 1
h : 5 = 5 + 1
h : 5 =6
h = 5 × 6
h = 30.