Singapore Math Drills Team · 22 September 2026
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Primary 1 maths becomes much less mysterious when your child knows what to look for first. Three early skills make a big difference: telling time to the hour, counting coins, and adding with a part-whole model. These are not just isolated facts. They help a child read a picture, organise information, and explain how an answer was found.
On the free sample worksheet, your child meets a clock-to-the-hour task, a coins total, and a simple addition story represented visually. The questions are short, but they practise habits that are worth building early: identify the important parts, count in an orderly way, and check whether the answer matches the picture.
What time is shown on the clock?
When the minute hand points straight up to 12, we say “o'clock”. The shorter hand tells us the hour. That gives a reliable two-part routine instead of asking your child to guess from the position of one hand.
It helps to describe the hands by their jobs rather than only by their length. The short hand answers “which hour?” and the long hand answers “how many minutes past the hour?” At this stage, the long hand at 12 is the important signal that the time is exactly on the hour.
Common mistake: Mixing up the hands and reading the short hand as the minutes. If a child says 12:07 here, ask which hand is pointing to 12 and which hand is pointing to 7, then repeat the two-step routine.
Try this at home: At each whole hour, ask your child to set a toy clock, name the time, and explain what the short hand and long hand are showing.
One 20¢ coin, two 10¢ coins and one 5¢ coin. How many cents altogether?
Coins are easier to count when they are grouped by value and counted from the biggest amount first. This keeps the running total visible and reduces the chance of counting an object twice.
Here is the same method as a running-total table:
| Coin added | Running total |
|---|---|
| 20¢ | 20¢ |
| 10¢ | 30¢ |
| 10¢ | 40¢ |
| 5¢ | 45¢ |
The table is useful because it shows the change after every coin. It also gives you a simple way to ask a checking question: “After the two 10¢ coins, how much should we have?” The expected answer is 40¢, so the final 5¢ takes the total to 45¢. Encourage your child to touch or move each coin once as it is counted. Concrete movement and a spoken total work together.
Common mistake: Counting the two 10¢ coins as one 10¢ coin, or starting again from 0 after each coin. Keep the coins in a line and say the running total each time: 20, 30, 40, 45.
Try this at home: Put four different coins in a row and let your child choose the biggest coin to count first, recording the running total after each coin.
Ravi has 7 blue marbles and 5 yellow marbles. How many marbles does he have altogether?
The word “altogether” tells us that two parts are being joined to make one whole. A part-whole model makes that structure clear before the calculation is written.
The split can be shown simply like this:
| Part | Split to make ten | Whole |
|---|---|---|
| 7 blue | 7 + 3 = 10 | 12 |
| 5 yellow | 3 + 2 | 10 + 2 = 12 |
This is not a trick for one question. Making ten is a flexible way to add because 10 is easy to combine with the remaining amount. Your child may also count on from 7: 8, 9, 10, 11, 12. Accept that method, then show how the make-ten split records the same thinking more neatly. The model helps the child see that 7 and 5 are still the original parts, even though 5 was temporarily split into 3 and 2.
Common mistake: Adding the numbers but forgetting what the answer counts. Ask, “What are the two parts, and what whole do they make?” The answer should be 12 marbles, not just 12.
Try this at home: Give your child two groups of small objects and ask them to split one group so the other group can make ten.
These early skills are easier to practise when a child can see the structure and get a useful next step. Singapore Math Drills provides visual questions, progressive hints, and step-by-step explanations after a wrong answer, so practice can become a calm learning moment. Adaptive practice and targeted drills help a child spend time on the skills that need attention, while the skill map shows where those skills sit in the question bank spanning Primary 1 to Secondary 4. G3 Mathematics — Additional Mathematics is not covered yet. Families can start with the free tier and a no-credit-card trial, without turning practice into a high-pressure event.
Mei has 8 red beads and 6 green beads. How many beads does she have altogether?
Hint: Make ten first: 8 + 2 = 10, then add the 4 that are left.
Try the free Primary 1 sample worksheet No sign-up or credit card is needed.