kembangkan cara cepat untuk menghitung perkalian bilangan sekitar 50 Gunakan cara tersebut untuk menghitung: 47×49 48×46 52×53 53×48 Pake cara pliss

The easiest way to count it is to divide Alice's stamps by 8 to see how many is 1/8 part of the ratio:
184 / 8 = 23
It means that Bernice has 23 * 9 = 207 stamps and Cheryl has 23 * 18 = 414 stamps.

Answered by SlowZasob | 2024-06-10

Bernice received 207 stamps and Cheryl received 414 stamps from the total that Alice, Bernice, and Cheryl shared in the ratio of 8:9:18. We found the value of one part by dividing Alice's 184 stamps by her ratio part of 8. Then, we calculated Bernice's and Cheryl's shares based on their respective parts in the ratio.
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Answered by SlowZasob | 2024-12-26

Jawaban:Cara cepat menghitung perkalian bilangan sekitar 50 memanfaatkan sifat distributif perkalian. Kita akan menggunakan 50 sebagai acuan. Rumus: (50 + a) * (50 + b) = 50² + 50(a+b) + ab dimana 'a' adalah selisih bilangan pertama dengan 50, dan 'b' adalah selisih bilangan kedua dengan 50. Contoh Perhitungan: - 47 × 49:a = 47 - 50 = -3b = 49 - 50 = -147 × 49 = 50² + 50(-3 + -1) + (-3)(-1) = 2500 + 50(-4) + 3 = 2500 - 200 + 3 = 2303- 48 × 46:a = 48 - 50 = -2b = 46 - 50 = -448 × 46 = 50² + 50(-2 + -4) + (-2)(-4) = 2500 + 50(-6) + 8 = 2500 - 300 + 8 = 2208- 52 × 53:a = 52 - 50 = 2b = 53 - 50 = 352 × 53 = 50² + 50(2 + 3) + (2)(3) = 2500 + 50(5) + 6 = 2500 + 250 + 6 = 2756- 53 × 48:a = 53 - 50 = 3b = 48 - 50 = -253 × 48 = 50² + 50(3 + -2) + (3)(-2) = 2500 + 50(1) - 6 = 2500 + 50 - 6 = 2544 Jadi, hasil perhitungannya adalah: - 47 × 49 = 2303- 48 × 46 = 2208- 52 × 53 = 2756- 53 × 48 = 2544

Answered by claudina2 | 2025-07-11