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9/4 x 44 + 32 = 131⁰F
Nomor 1
2,1 kg = 2100 gram
1 kg = 1000 gram + 500 gram = 1500 gram
Operasi pengurangan
2100 - 1500 = 600 gram
Agar setimbang, maka anak timbangan ditambah 600 gram (500 +100) ⇒ A