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1.) 90 ÷ 9 × 9 + 9 - 9 = ?
2.) 55² = ?
3.) 5! = ?
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» Penyelesaian
➠ No. 1
= 90 ÷ 9 × 9 + 9 - 9
= 10 × 9 + 9 - 9
= 90 + 9 - 9
= 99 - 9
= 90
➠ No. 2
= 55²
= 55 × 55
= 3.025
➠ No. 3
= 5!
= 5 × 4 × 3 × 2 × 1
= 20 × 3 × 2
= 60 × 2
= 120
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Penjelasan dengan langkah-langkah:
1.) 90 ÷ 9 × 9 + 9 - 9 = ?
= 10 × 9 + 9 - 9
= 90 + 9 - 9
= 99 - 9
= 90
2.) 55² = ?
= 55×55
= 3.025
3.) 5! = ?
= (5 × 4 × 3 × 2 × 1)
= (20 × 3 × 2 × 1)
= (60 × 2 × 1)
= (120 × 1)
= 120