20 + (-9) = 11
maaf kalau salah
Sebelum = 20 derajat Celcius
Setelah 3 jam = -9 derajat Celcius
= 20 - (-9)
= 20 + 9
= -29 derajat celcius (suhu semakin turun)
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20 + (-9) = 11
maaf kalau salah
Sebelum = 20 derajat Celcius
Setelah 3 jam = -9 derajat Celcius
= 20 - (-9)
= 20 + 9
= -29 derajat celcius (suhu semakin turun)