Kunci Jawaban Soal Matematika Kelas 9 SMP MTs Kurikulum 2013, Bilangan Bentuk Baku

b. (7,2×10⁻³)×(4×10⁵)

kunci jawaban:

= 7,2 × 4× 10⁻³ × 10⁵
= 28,8 ×1 0²
= 2,88 × 10 × 10²
= 2,88×10³

c. (5,25×10⁶)×(10⁻¹²)

kunci jawaban:

= 5,25 ×10⁶ × 10⁻¹²
= 5,25×10⁻⁶

d. (1,25×10¹⁶)/5 ×1 0⁶

kunci jawaban:

= 1,25/5 × 10¹⁶ × 10⁻⁶
= 0,25×10¹⁰
= 2,5:10×10¹⁰
= 2,5× 1/10 × 10¹⁰
= 2,5×10⁹

e. 1,6 × 10⁻³/2×10⁴