kelereng A 1 2/5 kelereng B. jika kelerengB= 45 butir, maka jumlah kelereng A adalah ...... butir

Please, let me answer your question :)
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[tex] 1\frac{2}{5} = \frac{1 \times 5 + 2}{5} = \frac{7}{5} [/tex]

[tex] \frac{7}{5} \times 45 = 63[/tex]

Jadi hasilnya adalah 63 buah.

Maaf kalau salah.

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kelereng a=7/5b 
kelereng b=45 butir

7/5 x 45 =63