Stabileşte valoarea de adevăr a egalităţilor:
5x7 + 8 x 9 + 8 x 6 + 4 = 65
100-9x5 + 4x0-29 = 26
5x8x2 x 1 0x0=0
4x8+9x0 + 10 x 6-3x1=10
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Răspuns:
Explicație pas cu pas:
5 × 7 + 8 × 9 + 8 × 6 + 4 =
35 + 72 + 48 + 4 =
155 + 4 = 159 ≠ 65 → Fals
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5 × 8 × 2 × 10 × 0 =
40 × 2 × 10 × 0 =
800 × 0 = 0 = 0 → Adevărat
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100 - 9 × 5 - 4 × 0 - 29 =
100 - 45 - 0 - 29 =
55 - 29 = 26 = 26 → Adevărat
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4 × 8 + 9 × 0 + 10 × 6 - 3 × 1 =
32 + 0 + 60 - 3 =
92 - 3 = 89 ≠ 100 → Fals