Types of dyscalculia: how to understand what exactly is going wrong for your child

Why the type matters, not just a diagnosis of “dyscalculia”

Two children with dyscalculia can look completely different. One doesn't understand the word “subtract” but counts objects without a single mistake. Another understands everything verbally but can't write a digit so that anyone can recognize it. A third reads a word problem just fine — but loses the given information halfway through solving it.

If you don't figure out what exactly isn't working, you can drill counting for months — and get no results. Because the problem lies elsewhere.

Verbal dyscalculia: the problem is with words

What it looks like. The child doesn't understand math words: “add,” “subtract,” “between,” “difference.” They may know the digits and count objects — but when a task is given in words, they get lost.

Check at home. Ask: “What does ‘add’ mean? Show me with your hands.” Or: “Put a cube between the other two.” Ask the child to explain in their own words what they just counted.

What helps. Working on math vocabulary: action verbs (add, take away, divide), opposites (more — less, longer — shorter), spatial words (above, below, between). The key is to link each word to an action with the hands.

Practognostic dyscalculia: the problem is with handling objects

What it looks like. Can't translate a real-life situation into math. Counts objects and loses track. Can't see which group has more without counting. Confuses left and right.

Check at home. Put 5 spoons in a pile and 5 forks in a row: “Which are there more of?” If the child says “forks,” they're going by the length of the row, not the quantity. Ask them to build a tower of blocks from biggest to smallest.

What helps. Finger counting while saying the numbers out loud. Stacking rings and nesting dolls — ordering by size. Spatial orientation: first “on your own body” (left hand, right ear), then in the space around you.

Graphical dyscalculia: the problem is with writing

What it looks like. The child understands quantity and can count out loud — but can't write a digit correctly. Writes digits mirrored (6 instead of 9). Confuses similar digits (3 and 8).

Check at home. Ask the child to write the digits from 1 to 10. Are any of them mirrored? Now ask them to find the mistake on their own — do they notice it?

What helps. Visual analysis: “How is 6 different from 9? Point to where the tail is facing.” Shaping digits out of modeling clay. Drawing with a finger in sand or grain — tactile reinforcement of the image.

Operational dyscalculia: the problem is with calculating

What it looks like. Understands the task but keeps making mistakes when calculating. Still counts even the simplest problems on their fingers by the end of Grade 1. Can't remember the multiplication table.

Check at home. Ask “What's 3+4?” and watch. Do they count on their fingers starting from one? Take a long time? Start over every time?

What helps. Working on number bonds with objects. Structured dot cards. Number frames that show the structure of a number (5+2, not seven dots in a row).

Dyslexic dyscalculia: the problem is with reading symbols

What it looks like. Confuses math signs: + and ×, < and >. Misreads multi-digit numbers (reads 821 as “two hundred eighty-one”). Often occurs together with dyslexia.

Check at home. Show “3 < 5” and ask: “What does this say?” Write the number 304 and ask the child to read it out loud.

What helps. Linking a sign to a real action: the “+” sign is when we put things together, “−” is when we take things away. Building the visual image through objects, not through rote memorization.

What to do next

Observations at home are the first step. They help you come to a specialist (a speech therapist or a neuropsychologist) with specific examples rather than a general “we're having trouble with math.” Only a specialist can accurately identify the leading type and build an intervention program — but understanding the map of difficulties is useful for every parent.