Free short notes and revision cards
Grade 2 Mathematics on Temari has 25 revision cards, arranged by the chapters of the Ethiopian national curriculum. Every card says when the rule applies, what each symbol in it stands for, and the mistake students most often make with it. They are free to read and need no account.
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When you use it
Use this when you must arrange several whole numbers up to 1000 from smallest to largest or from largest to smallest.
Watch out
Compare hundreds first, then tens, then ones. A number with fewer hundreds must come before one with more hundreds, even when its tens digit is larger.
Drafted from Grade 2 Mathematics, pages 1-23, then checked twice before it went up
When you use it
Use this when you must place the symbol >, < or = between two whole numbers up to 1000.
Watch out
Compare hundreds with hundreds, tens with tens and ones with ones. Check the hundreds first, then the tens, then the ones; a number with more hundreds is always the larger one.
Drafted from Grade 2 Mathematics, pages 1-23, then checked twice before it went up
When you use it
Use this when a question asks you to count on or back in hundreds from a number up to 1000.
Watch out
When you count in hundreds only the hundreds digit changes and the last two digits stay the same, so from 300 the next number is 400, not 405.
Drafted from Grade 2 Mathematics, pages 1-23, then checked twice before it went up
| Hundreds (መቶ) | Tens (አስር) | Ones (አንድ) |
|---|---|---|
| 5 | 9 | 2 |
| 4 | 5 | 6 |
| 3 | 2 | 4 |
When you use it
Use this when you must name the hundreds, tens or ones digit of a number up to 1000, or write a number in place value columns.
Watch out
Count place values from the right: in 592 the 2 is in the ones place and the 5 is in the hundreds place, so do not read the digits in the order they are written.
Drafted from Grade 2 Mathematics, pages 1-23, then checked twice before it went up
When you use it
Use this method when the sum of digits in any place value column equals 10 or greater.
Watch out
Forgetting to add the carried-over digit into the next place value column on the left.
Drafted from Grade 2 Mathematics, pages 24-44, then checked twice before it went up
When you use it
Use this method to add two-digit or three-digit numbers vertically when the sum in each place value is 9 or less.
Watch out
Adding digits from different place values, such as adding a ones digit to a tens digit.
Drafted from Grade 2 Mathematics, pages 24-44, then checked twice before it went up
| Multiplication | Result |
|---|---|
When you use it
Use this to quickly find the product when multiplying any number by 0 or 1.
Watch out
Multiplying by 0 always results in 0, while multiplying by 1 leaves the number unchanged.
Drafted from Grade 2 Mathematics, page 45 onwards, then checked twice before it went up
When you use it
Use this when multiplying whole numbers by 10.
Watch out
Do not add 10 to the number, place a 0 at the end of the number.
Drafted from Grade 2 Mathematics, page 45 onwards, then checked twice before it went up
When you use it
Use this when finding the product of any number and 2, which means doubling.
Watch out
Multiplying by 2 means adding the number to itself, not adding 2 to the number.
Drafted from Grade 2 Mathematics, page 45 onwards, then checked twice before it went up
When you use it
Follow these steps when solving mathematical word problems.
Watch out
Identify what is given and what is asked before choosing the operation and calculating.
Drafted from Grade 2 Mathematics, page 45 onwards, then checked twice before it went up
| Fraction | Equal parts in one whole |
|---|---|
| 2 | |
| 4 |
When you use it
Use when naming a part of a whole shared into two or four equal pieces, or when asked how many halves or quarters a whole has.
Drafted from Grade 2 Mathematics, pages 63-71, then checked twice before it went up
When you use it
Reach for this when a whole object, shape or group is shared equally into two or four parts and you need to name each part.
Drafted from Grade 2 Mathematics, pages 63-71, then checked twice before it went up
When you use it
Use when shading or naming a half or a quarter in a picture or shape.
Watch out
A shape cut into two pieces of different size is not a half, and four uneven pieces are not quarters. Fold the shape to check that the parts match exactly before you shade or name them.
Drafted from Grade 2 Mathematics, pages 63-71, then checked twice before it went up
| Number of quarters | Equal to |
|---|---|
| 2 | |
| 4 | |
| 8 |
When you use it
Use when converting a number of quarters into halves or wholes, for example when a question asks how many halves two quarters make.
Watch out
Two quarters make one half, not one whole. Four quarters make one whole, and eight quarters make two wholes.
Drafted from Grade 2 Mathematics, pages 63-71, then checked twice before it went up
When you use it
Use this when a pattern has blanks or asks what comes next.
Watch out
Find the unit first, then continue it in the same order. In 149 149 149 149 ? the next member is 149, not 49 or 9.
Drafted from Grade 2 Mathematics, pages 72-79, then checked twice before it went up
When you use it
Use this when you must name a repeating pattern as one-unit, two-unit or three-unit.
Watch out
Count the distinct items in one repeat, not the total number of items. 88888 is a one-unit pattern because only 8 repeats, even though there are five 8s.
Drafted from Grade 2 Mathematics, pages 72-79, then checked twice before it went up
When you use it
Use when combining or finding the difference between two length measurements.
Watch out
Add or subtract only quantities that have the exact same unit of measurement.
Drafted from Grade 2 Mathematics, pages 80-101, then checked twice before it went up
When you use it
Use when identifying the rule of a pattern or finding missing terms in a sequence.
Watch out
Find the complete repeating core unit before filling in missing members.
Drafted from Grade 2 Mathematics, pages 80-101, then checked twice before it went up
| Quantity | Standard Units |
|---|---|
| Length | , |
| Mass | , |
| Capacity | , |
When you use it
Use when identifying the correct measurement unit for length, mass, or capacity.
Watch out
Only add or subtract measurements that have the exact same unit.
Drafted from Grade 2 Mathematics, pages 102-110, then checked twice before it went up
When you use it
Use when sorting collected data or pictures into distinct groups.
Watch out
Choose a single consistent rule, such as size, use, or material, before grouping items.
Drafted from Grade 2 Mathematics, pages 102-110, then checked twice before it went up
When you use it
Use tally marks to count data items and record their frequencies in a table.
Watch out
Draw single vertical lines for each item up to four, and use the fifth line to cross the group of four.
Drafted from Grade 2 Mathematics, pages 111-122, then checked twice before it went up
When you use it
Use this rule to determine the number of sides or corners of any plane figure.
Watch out
The number of sides and the number of corners in a plane figure are always equal.
Drafted from Grade 2 Mathematics, pages 111-122, then checked twice before it went up
When you use it
Use this concept when comparing two or more geometric shapes by shape and size.
Watch out
Similar figures have the exact same shape, but they can differ in size.
Drafted from Grade 2 Mathematics, pages 111-122, then checked twice before it went up
When you use it
Use this rule when adding or subtracting amounts given in Birr and Santim.
Watch out
Never add Birr directly to Santim. Always compute Birr with Birr and Santim with Santim separately.
Drafted from Grade 2 Mathematics, page 123 onwards, then checked twice before it went up
When you use it
Use this formula to find the correct change returned after paying for goods.
Watch out
Do not subtract the money given from the price. Always subtract the price from the money given.
Drafted from Grade 2 Mathematics, page 123 onwards, then checked twice before it went up
The student textbook for the new curriculum, free as a PDF. The cards on this page follow its chapters.
Ministry of Education edition, Amharic
148 pages
Oromia Education Bureau edition, Amharic
120 pages
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