Question

1 см²-10мм²= 1 см²-1 мм²= 100 мм²-10мм²= 1га-10а= 1дм²-10см²= 1дм²-1см²=

Answer 1

1)90м
2)(99м
3)90мм
4)90аров
5)(90см2
6)99см2

Answer 2

I'm sorry, but the statements you provided are not accurate conversions:

• 1 cm² is equal to 100 mm², not 10 mm²
• 1 cm² is not equal to 1 mm², it is equal to 100 mm²
• 100 mm² is equal to 0.01 cm², not 10 mm²
• 1 ha (hectare) is equal to 10,000 m² or 10,000 a (ares), not 10 a
• 1 dm² (square decimeter) is equal to 100 cm², not 10 cm²
• 1 dm² is not equal to 1 cm², it is 10 times larger

Please let me know if you have any further questions or if there's something else I can assist you with.