Hitunglah. 1. (+2) – (+9) 2. (+1) – (-5) 3. (-6) – (-17) 4. 0 – (-12)

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kali ini kita akan membahas soal berikut nya…
Hitunglah. 1. (+2) – (+9) 2. (+1) – (-5) 3. (-6) – (-17) 4. 0 – (-12)
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