kali ini kita akan membahas soal berikut nya…
Perkalian
1. (+2) × (+5)
2. (+3) × (-8)
3. (-4) × (+9)
4. (-6) × (-7)
5. 2 × (-6) × (+10)
6. -3 × 8 × (-2)
7. (-9)2
8. -92
9. (-4)3
10. 0,72
11. (-3/5) × (+5/8)
12. 8 × (-1/4) × (-7)
Pembahasan:
1. (+2) × (+5) = 2 × 5 = 10
2. (+3) × (-8) = -(3 × 8) = -24
3. (-4) × (+9) = -(4 × 9) = -36
4. (-6) × (-7) = 6 × 7 = 42
5. 2 × (-6) × (+10) = -(2 × 6 × 10) = -120
6. -3 × 8 × (-2) = 3 × 8 × 2 = 48
7. (-9)2 = (-9) × (-9) = 9 × 9 = 81
8. -92 = -(9 × 9) = -81
9. (-4)3 = (-4) × (-4) × (-4) = -64
10. 0,72 = 0,7 × 0,7 = 0,49
11. (-3/5) × (+5/8) = -(3/5 × 5/8) = –3/8
12. 8 × (-1/4) × (-7) = 8 × 1/4 × 7 = 14
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