Subtraction with pictures helps young students see what happens when some objects are taken away from a group. This cheat sheet gives K-1 students a simple reference for subtraction facts from 1 to 10. It is useful because pictures make subtraction feel concrete before students work only with numbers.
Students can point, cross out, count, and say the number sentence aloud.
Key Facts
- Subtraction means taking away from a starting number to find how many are left.
- In 5 - 2 = 3, the number 5 is the starting number, 2 is taken away, and 3 is left.
- The minus sign, -, means take away, subtract, or find the difference.
- The equal sign, =, means both sides show the same amount.
- To subtract with pictures, count all the objects, cross out the objects taken away, then count what is left.
- A subtraction sentence has this pattern: whole - part = part left.
- Subtraction facts from 1 to 10 use starting numbers no greater than 10.
- Addition can check subtraction because 7 - 3 = 4 and 4 + 3 = 7 are related facts.
Vocabulary
- Subtraction
- Subtraction is taking away from a group to find how many are left.
- Minus sign
- The minus sign, -, tells you to take away or subtract.
- Equal sign
- The equal sign, =, shows that two amounts are the same.
- Whole
- The whole is the total number of objects before any are taken away.
- Part
- A part is one smaller group that belongs to the whole group.
- Difference
- The difference is the answer to a subtraction problem.
Common Mistakes to Avoid
- Counting the crossed-out pictures as the answer is wrong because the answer is the number left, not the number taken away.
- Starting with the smaller number is wrong in take away problems because you must begin with the whole group, such as 8 in 8 - 3.
- Forgetting to cross out objects can lead to guessing, so mark or cover the objects taken away before counting what remains.
- Mixing up + and - is wrong because + means put together, while - means take away.
- Writing the answer before counting what is left can be wrong because the picture should match the subtraction sentence.
Practice Questions
- 1 There are 6 apples. Cross out 2 apples. How many apples are left? Write the subtraction sentence.
- 2 There are 9 stars. Take away 4 stars. How many stars are left?
- 3 Solve with a picture: 10 - 3 = ?
- 4 Mia says 7 - 2 means you should count the 2 objects crossed out as the answer. Is Mia correct? Explain what the answer should show.
Understanding Subtraction with Pictures (1-10)
Picture subtraction develops one-to-one counting. This means each object gets one number word when a child counts. A student may know the count words in order but still make mistakes by touching one picture twice or skipping a picture.
Arrange counters in a straight line at first. Move each counter into a separate space while counting. This makes the total easier to trust.
After some counters are removed, count only the remaining counters from the beginning. Do not continue counting from the number that was said before. A crossed-out picture is no longer part of the amount left, even though it can still be seen on the page.
Pictures can show different subtraction situations. A take-away story begins with a group and shows some leaving. For example, six birds are on a fence, then two fly away.
A picture can also compare two groups. If one child has six blocks and another has four blocks, the difference is two blocks. In a comparison picture, nothing may actually be crossed out.
Students can line up the blocks in matching pairs. The blocks with no partner show the difference.
Both situations use subtraction, but the story behind them is different. Knowing the story helps a child decide what the numbers mean.
The order of the numbers matters in a take-away problem. Starting with six items and removing two leaves four. Starting with two items cannot remove six real items from that group.
Young learners often reverse numbers because they notice the numbers but do not connect them to the picture. Ask them to identify the whole group before they do any crossing out. Zero is another useful idea.
When every item in a group is removed, zero items remain. A child should see zero as a real amount that means none are left, not as a blank space or a missing answer.
Related addition facts can strengthen picture work without replacing it too soon. After a child sees that six take away two leaves four, they can put the two removed counters back. Four counters joined with two counters make six again.
This shows that subtraction can be checked by rebuilding the original whole. It also helps children learn facts in connected groups rather than as separate facts to memorize. In daily life, subtraction appears when sharing crackers, using up stickers, losing a turn in a game, or finding how many seats are empty.
Pay attention to whether a child counts carefully, understands which objects are removed, and can explain what the remaining group represents. The explanation matters as much as saying the final number.