Cele 2 ex!!
Le vreau cu operații!!
Fara răspunsuri directe!!!
Răspunsuri la întrebare
Exercitiul 1
a × 3 = 27
a = 27 : 3
a = 9
9 × a = 63
a = 63 : 9
a = 7
a × 8 = 48
a = 48 : 8
a = 6
7 × a = 42
a = 42 : 7
a = 6
5 × a = 50
a = 50 : 5
a = 10
8 × a = 8
a = 8 : 8
a = 1
(3 + 4) × a = 56
7 × a = 56
a = 56 : 7
a = 8
a × (25 - 17) = 72
a × 8 = 72
a = 72 : 8
a = 9
(100 - 91) × a = 36
9 × a = 36
a = 36 : 9
a = 4
a × (4 + 5) = 45
a × 9 = 45
a = 45 : 9
a = 5
(1000 - 992) × a = 48
8 × a = 48
a = 48 : 8
a = 6
a × (10 - 10) = 0
a × 0 = 0
a ∈ R
a × 5 × 5 = 25
a × 25 = 25
a = 25 : 25
a = 1
2 × 4 × a = 40
8 × a = 40
a = 40 : 8
a = 5
a × 2 × 3 = 24
a × 6 = 24
a = 24 : 6
a = 4
9 × 1 × a = 81
9 × a = 81
a = 81 : 9
a = 9
3 × a × 2 = 54
a × 6 = 54
a = 54 : 6
a = 9
a × a × 8 = 32
a² = 32 : 8
a² = 4
a ∈ {-2, 2}
Exercitiul 2
a - (6 × 7) = 48
a - 42 = 48
a = 48 + 42
a = 90
(8 × 7) - a = 20
56 - a = 20
a = 56 - 20
a = 36
a + (8 : 1) = 24
a + 8 = 24
a = 24 - 8
a = 16
(7 : 7) + a = 21
1 + a = 21
a = 21 - 1
a = 20
a - (10 : 10) = 99
a - 1 = 99
a = 99 + 1
a = 100
1219 - a = 948
a = 1219 - 948
a = 271
a - 4914 = 1748
a = 1748 + 4914
a = 6662
1219 - a = 999
a = 1219 - 999
a = 20
(6 × 6) ÷ a = 4
36 : a = 4
a = 36 : 4
a = 9
a : (4 : 1) = 7
a : 4 = 7
a = 7 × 4
a = 28