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Fifth grade supplementary exercises, math problems
9 * 50 = 450g ... The weight of nine 50g weights.

Because a quarter box of glass balls

Nine weights weighing 50 grams

= a whole box of glass balls

Subtract a quarter box of glass balls from both sides at the same time.

The weight of the remaining 9 50g weights = 3/4 boxes of glass balls.

450/ three quarters = 600g

Give me some. My math teacher won't ask me questions.