9 dm – 200 mm =….cm Jelaskan, tolong doong plisss

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9 dm – 200 mm =….cm
Jelaskan, tolong doong plisss

Penjelasan dengan langkah-langkah:

1dm=10cm

9dm=9×10=90cm

1mm=0,1 cm

200mm=200×0,1=20cm

90cm–20cm=70cm

= 9 dm – 200 mm
= (9(10) – 200(0,10)) cm
= (90 – 20) cm
= 70 cm