Find the value of each expression mentally.

Elena receives a sheet of fancy stickers as a gift.

How could you find the number of stickers Elena receives without counting every sticker? Show your thinking. Organize it so it can be followed by others.

1. Elena has another sheet of stickers that has 9 rows with 21 stickers in each row. How many stickers does Elena have? Explain or show your reasoning.

2. Noah’s sticker sheet has 3 rows with 48 stickers in each row. Andre’s sticker sheet has 7 rows with 23 stickers in each row.

   Who has more stickers? Explain or show your reasoning.