# Grade 2: Mathematics A course roadmap (maths). Language: en. By @si. Licence: CC BY-SA 4.0. 0 of 17 concepts ready. In the app: https://ai.page/roadmap/jp-mext-grade-2 Part of: [Japan MEXT: Mathematics](https://ai.page/roadmap/jp-mext.md) Goal: Japan Course of Study (MEXT), elementary school: Mathematics, Grade 2 ## 1. Numbers and Calculations · To help pupils understand the meaning and the representations of numbers, and extend their ability to use numbers. - [What Multiplication Means](https://ai.page/c/what-multiplication-means/index.md): Interpret products of whole numbers (e.g. 5 × 7 as the total number of objects in 5 groups of 7) - [Numbers to 10,000](https://ai.page/c/numbers-to-10-000/index.md): Identify, represent, and estimate numbers up to 10,000 using different representations - [Tenths (age 8+)](https://ai.page/c/tenths-age-8/index.md): Count up and down in hundredths; recognise that hundredths arise when dividing an object by 100 or dividing tenths by 10 - [Understanding fractions](https://ai.page/c/understanding-fractions-maths/index.md): Write simple fractions (e.g. 1/2 of 6 = 3) and recognise the equivalence of 2/4 and 1/2 ## 2. Numbers and Calculations · To help pupils deepen their understanding of addition and subtraction, and extend their ability to use the calculations. - [Adding and subtracting (age 7+)](https://ai.page/c/adding-and-subtracting-age-7/index.md): Add and subtract numbers with up to three digits using formal written methods of columnar addition and subtraction - [Adding and subtracting (age 8+)](https://ai.page/c/adding-and-subtracting-age-8/index.md): Add and subtract numbers with up to four digits using formal written methods of columnar addition and subtraction - [Adding two two-digit numbers](https://ai.page/c/adding-two-two-digit-numbers/index.md): Add and subtract two two-digit numbers using concrete objects, pictorial representations, and mental methods - [Money Addition & Subtraction](https://ai.page/c/money-addition-and-subtraction/index.md): Solve simple money problems involving addition and subtraction, including giving change ## 3. Quantities and Measurements · To help pupils understand the meaning of units and measurements of length and measure the length. - [Measuring with different units](https://ai.page/c/measuring-with-different-units/index.md): Measure the length of an object using two different length units and describe how the measurements relate to the size of the unit chosen - [Calculating with measurements](https://ai.page/c/calculating-with-measurements/index.md): Measure, compare, add, and subtract lengths (m/cm/mm), mass (kg/g), and volume/capacity (l/ml) using standard units - [Estimating Lengths](https://ai.page/c/estimating-lengths/index.md): Estimate lengths using units of inches, feet, centimetres, and metres ## 4. Quantities and Measurements · To help pupils understand the meaning of units and measurements of volume and measure the volume. - [Choosing measurement units](https://ai.page/c/choosing-measurement-units/index.md): Choose and use appropriate standard units to measure length (m/cm), mass (kg/g), temperature (°C), and capacity (litres/ml) to the nearest appropriate unit - [Measuring Liquids & Masses](https://ai.page/c/measuring-liquids-and-masses/index.md): Measure and estimate liquid volumes and masses of objects using grams, kilograms, and litres; solve one-step word problems involving mass or volume ## 5. Quantities and Measurements · To help pupils understand time and use it. - [Comparing Time Durations](https://ai.page/c/comparing-time-durations/index.md): Compare durations of events and calculate the time taken by particular events or tasks ## 6. Geometrical Figures · Through activities such as observing and composing the shapes of objects, to help pupils pay attention to the elements that compose geometrical figures, and understand geometrica - [Composing Shapes](https://ai.page/c/composing-shapes/index.md): Compose two-dimensional shapes (rectangles, squares, trapezoids, triangles, half-circles, quarter-circles) to create composite shapes, and compose new shapes from the composite shape ## 7. Mathematical Relations - [Representing Addition and Subtraction](https://ai.page/c/representing-addition-and-subtraction/index.md): Represent addition and subtraction using objects, drawings, and mental images - [Connecting maths to real life](https://ai.page/c/connecting-maths-to-real-life/index.md): Represent real-world problems with number sentences, bar models, or diagrams, and interpret the mathematical result back in context ## Health: 0 of 100 Of its 17 own concepts: 0 have an explanation, 0 have practice, 0 have a measurement question, 0 have a checked version. Findings (each is a task for anyone's AI): - What Multiplication Means has no explanation yet - Numbers to 10,000 has no explanation yet - Tenths (age 8+) has no explanation yet - Understanding fractions has no explanation yet - Adding and subtracting (age 7+) has no explanation yet - Adding and subtracting (age 8+) has no explanation yet - Adding two two-digit numbers has no explanation yet - Money Addition & Subtraction has no explanation yet - Measuring with different units has no explanation yet - Calculating with measurements comes before Choosing measurement units, which it needs - Calculating with measurements has no explanation yet - Estimating Lengths has no explanation yet - Choosing measurement units has no explanation yet - Measuring Liquids & Masses has no explanation yet - Comparing Time Durations has no explanation yet - Composing Shapes has no explanation yet - Representing Addition and Subtraction has no explanation yet - Connecting maths to real life has no explanation yet Credit: The structure of Japan Course of Study (MEXT), elementary school: Mathematics (https://www.mext.go.jp/component/english/__icsFiles/afieldfile/2011/03/17/1303755_004.pdf); concepts from the Marble Skill Taxonomy (v1), © Generative Spark, Inc. (withmarble.com), text CC BY-SA 4.0, database ODbL 1.0: https://github.com/withmarbleapp/os-taxonomy, mapped to its standards by Marble.