Penjelasan dengan langkah-langkah:
10. 5/3 × 4/5 ÷ 5/9
= 5/3 × 4/5 × 9/5
= 20/15 × 9/5
= 180/75 (disederhanakan ) ÷ 15
= 12/5
= 2 2/5
13. l = π×r²
= 22/7 × 14× 14
= 22 × 2 × 14
= 44 × 14
= 616cm²
15. l = π × r²
= 3,14 × 10 × 10
= 314cm²
jika membuat 1 lusin = 12 buah
maka, 314cm² × 12 biji
= 3.768cm²
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Penjelasan dengan langkah-langkah:
10. 5/3 × 4/5 ÷ 5/9
= 5/3 × 4/5 × 9/5
= 20/15 × 9/5
= 180/75 (disederhanakan ) ÷ 15
= 12/5
= 2 2/5
13. l = π×r²
= 22/7 × 14× 14
= 22 × 2 × 14
= 44 × 14
= 616cm²
15. l = π × r²
= 3,14 × 10 × 10
= 314cm²
jika membuat 1 lusin = 12 buah
maka, 314cm² × 12 biji
= 3.768cm²