The answer is as follows:

1 kg =2 kg

Because a kilo is 10 yuan.

therefore

One kilogram =2x 10=20

Multiplication operation properties:

Multiply the product of several numbers by a number so that any factor in the product can be multiplied by this number and then multiplied by other numbers. For example: (25×3 × 9)×4=25×4×3×9=2700.

Multiply a number by the difference between two numbers, and you can multiply the minuend and the minuend by this number respectively, and then subtract the product. For example: (137-125) × 8 =137× 8-125× 8 = 96.