*If a rock needs to weigh 2,000 kilograms (about 2 tons) in order not to be shifted by waves, how big (what volume) does it need to be?You are using basalt, which has a typical density of 3200 kg/m In this problem you need a volume, so you will need to rearrange the density equation to get volume.*

*If a rock needs to weigh 2,000 kilograms (about 2 tons) in order not to be shifted by waves, how big (what volume) does it need to be?*You are using basalt, which has a typical density of 3200 kg/m In this problem you need a volume, so you will need to rearrange the density equation to get volume. Chazan (Eds.), Designing learning environment for developing understanding of geometry and space (pp.

Chinese Journal of Science Education, 23(1), 53-82.

An experiment of three-dimensional spatial geometry and volume measurement integrated digital teaching materials and instruction.

Mathematical tasks and student cognition: Classroom-based factors that support and inhibit high-level mathematical thinking and reasoning Journal for Research in Mathematics Education, 28(5), 524-549.

Grouws (Ed.), Handbook of research on mathematics teaching and learning (pp.

(Ed.), Second handbook of research on mathematics teaching and learning: A project of National Council of Teachers Mathematics (pp.

Journal for Research in Mathematics Education, 27(3), 258-292.

In National Academy for Educational Research (Ed.), Conference handbook of 2013 Trend of Development of Digital Textbooks for Elementary and Junior-High Schools, pp. (In Chinese.) Taipei, Taiwan: Taipei Branch of National Academy for Educational Research.

The influence of digital materials for teaching volume measurement on fourth-graders' learning of volume concepts.

In this case, you are asked for a mass, not the density.

You will need to rearrange the density equation so that you get mass.

## Comments How To Solve Volume Problems

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