E2.6: Use the formula for the area of a rectangle to find a missing…
Use the formula for the area of a rectangle to find a missing measurement when two of the three are known.
The Ontario Mathematics, Grades 1–8 outcome E2.6 (Spatial Sense) for Grade 4 says: “Use the formula for the area of a rectangle to find a missing measurement when two of the three are known.” This Fieldbook unit teaches it hands-on, with everyday materials and a printable teacher guide and student sheet for every lesson. Official wording: Ontario Mathematics, Grades 1–8.
Fence It, Fill It: Area and Perimeter Grades 3–4
Which mat is really the biggest? Does the same fence always hold the same garden? Can the same rug need more edging? Four lessons where students tile, stretch rope and chalk the schoolyard to find out that area and perimeter measure different things.
- Can the same rug need more edging? 45–60 min
Teams build every rectangle they can from the same 24 square tiles and find that the edging around them runs from 20 to 50 tile edges. Students explain that the same area can have different perimeters, and use length × width = area to find a missing side.
Printable practice for E2.6
- Fence It, Fill It: Area and Perimeter workbook included with the unit
3 English-support pages, 3 practice pages, 3 readings, 1 word wall, 1 unit review, 1 unit test, with answer keys.
- Grade 4 Ontario Math: Spatial Sense printable pack
1 reading, 1 practice page, 1 assessment, with answer keys. Free sample.
- Grade 4 Time and Measurement Problems printable pack
2 practice pages, with answer keys. Free sample.
- Grade 4 Common Core Math: Patterns and Algebraic Thinking printable pack
1 practice page, with answer keys. Free sample.
- Grade 4 Common Core Math: Geometry and Measurement printable pack
1 reading, 1 practice page, 1 assessment, with answer keys. Free sample.
- Grade 4 Time and Measurement Word Problems (Common Core) printable pack
4 practice pages, with answer keys. Free sample.
- Grade 5 Common Core Math: Geometry and Measurement printable pack
1 practice page, with answer keys. Free sample.
Need just this outcome? Build a custom pack from these pages, with its answer key, in about a minute. Custom packs come with All-access and school licences.
Compared with Common Core: 4.MD.A.3.
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