Johan memiliki dana 4.500.000. Uang itu digunakan untuk membeli kamera seharga 2.500.000 sebelum dikenakan diskon 20%. Selain itu, dia juga menggunakan uangnya untuk pengeluaran lain sejumlah 1.500.000. Berapa sisa uang Johan saat ini?
Answer (3)
The answer should not depend on which machine or which pencil you use to find it. If you work a problem two different ways and get two different answers, then at least one of them is wrong, and there's a pretty good chance that both of them are.
(9.99 of anything) + (1.11 of the same thing) = 11.1 of them
9.99 (x 10^-2) + 1.11 (x 10^-2) = 11.1 (x 10^-2) .
Can we do any more with that ?
10^-2 = 1 / 10^2 = 1 / 100 .
11.1 x 10^-2 = 11.1 / 100 = 0.111
The expression 9.99 × 1 0 − 2 + 1.11 × 1 0 − 2 adds to 0.111 when calculated. This is achieved by adding the coefficients since both terms share the same exponent. Finally, the result can be presented in decimal form as 0.111 .
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Jawaban:Rp 1.000.000Penjelasan:1. Harga kamera sebelum diskon:Rp 2.500.000Diskon 20%:20% × 2.500.000 = Rp 500.000Harga kamera setelah diskon:2.500.000 − 500.000 = Rp 2.000.0002. Pengeluaran lain:Rp 1.500.0003. Total pengeluaran:2.000.000 (kamera) + 1.500.000 = Rp 3.500.0004. Dana awal Johan:Rp 4.500.000 Sisa uang Johan:4.500.000 − 3.500.000 = Rp 1.000.000
