Hitunglah. 1. (+8) – (+2) 2. (+3) – (+7) 3. (+5) – (-4) 4. (-12) – (+9)

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kali ini kita akan membahas soal berikut nya…
Hitunglah. 1. (+8) – (+2) 2. (+3) – (+7) 3. (+5) – (-4) 4. (-12) – (+9)
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