求未知数x
8.6÷Ⅹ=2 | Ⅹ×(1+)=36 | Ⅹ÷1=2 |
1Ⅹ=10 | 3÷Ⅹ=3.5 | Ⅹ-5=2. |
填上合适的数或“<”、“>”、“=”. 475________086≈475万 | 960023480≈________亿 |
59________6982001≈60亿 | 5200000=________万 |
12900000000=________亿 | 8920000=________万 |
300000000________3亿 | 50921005100________509亿 |
584320________58万 | 218万________21800000 |
1002002002________10亿 | 12000000000________120亿. |