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Hitunglah. 1. (+6) × (+5) 2. (-7) × (-8) 3. (+12) × (-3) 4. (-2) × (+10)

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Hitunglah.

1.     (+6) × (+5)

2.     (-7) × (-8)

3.     (+12) × (-3)

4.     (-2) × (+10)

Pembahasan:

1.     (+6) × (+5) = 6 × 5 = 30

2.     (-7) × (-8) = 7 × 8 = 56

3.     (+12) × (-3) = -(12 × 3) = -36

4.     (-2) × (+10) = - (2 × 10) = -20

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