Rezolva exercitiile aplicand regula invatata
Rezolvare
a)
16 - (5 x 9 - 40) = 16 - (45 - 40) = 16 - 5 = 11
220 + (16 : 4 - 4) = 220 + (4 - 4) = 220 + 0 = 220
(5 x 8 : 4 - 10) x 8 = (40 : 4 - 10) x 8 = (10 - 10) x 8 = 0 x 8 = 0
(7 + 8 x 5) - 49 : 7 = (7 + 40) - 49 : 7 = 47 - 49 : 7 = 47 - 7 = 40
b)
2 + (2 x 2 : 2 - 2) x 2 = 2 + (4 : 2 - 2) x 2 = 2 + (2 - 2) x 2 = 2 + 0 x 2 = 2 + 0 = 2
1 + 2 x (3 x 4 + 5 x 6) = 1 + 2 x (12 + 30) = 1 + 2 x 42 = 1 + 84 = 85
124 + 2 x (53 - 45 + 18 : 9) = 124 + 2 x (53 - 45 + 2) = 124 + 2 x (8 + 2) = 124 + 2 x 10 = 124 + 20 =144
1652 - 7 x (162 - 9 x 8 - 8 x 10) = 1652 - 7 x (162 - 72 - 80) = 1652 - 7 x (90 - 80) = 1652 - 7 x 10 =
= 1652 - 70 = 1582
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