Practice!

Sample Problem

The total mass of a toy rocket and 8 tennis balls is 730 g. If the mass of each tennis ball is 35 g, what is the total mass of 2 such rockets and 3 tennis balls?

  g

Solution

Description: 计算机生成了可选文字: _7309-

The total mass of the tennis balls: 35 g x 8 = 280 g

Then, the mass of one rocket: 730 g - 280 g = 450 g

Description: 计算机生成了可选文字: 4509
4509
3〕913591359

Thus, 450 g x 2 + 35 g x 3 = 1,005 g