Hitunglah. 1. (+4) × (+2) 2. (-4) × (-8) 3. (-7) × (+9) 4. (+3) × (-10) 5. (-18) × (-3)
Hitunglah.
1. (+4) × (+2)
2. (-4) × (-8)
3. (-7) × (+9)
4. (+3) × (-10)
5. (-18) × (-3)
6. 0 × (-5)
7. (-4,8) × (+1,3)
8. (+2/3) × (-9/2)
9. (-2,5) × (-4/3)
Pembahasan:
1. (+4) × (+2) = 4 × 2 = 8
2. (-4) × (-8) = 4 × 8 = 32
3. (-7) × (+9) = -(7 × 9) = -63
4. (+3) × (-10) = -(3 × 10) = -30
5. (-18) × (-3) = 18 × 3 = 54
6. 0 × (-5) = 0
7. (-4,8) × (+1,3) = -(4,8 × 1,3) = -6,24
8. (+2/3) × (-9/2) = -(2/3 × 9/2) = -3
9. (-2,5) × (-4/3) = 2,5 × 4/3 = 10/3
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