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Why your child can multiply but not explain it

Procedure without meaning collapses in Grade 6. Here is what to listen for.

Ask a nine-year-old for seven times eight and you will usually get fifty-six. Ask them what seven times eight means, and the room goes quiet. That silence is the thing worth paying attention to, because it predicts what happens two years later far better than the correct answer does.

Multiplication tables are stored as facts. Facts are cheap to recall and cheap to lose. What Grade 6 starts demanding is different: ratio, scale, area, algebra. All of them assume the child holds a picture of what multiplying does, not just a list of what it produces.

The two answers that look the same

Put the same question to two children and both write 56. One counted rows. The other retrieved a stored pair. On a worksheet these are indistinguishable. In a word problem they are not.

Recalled
7 × 8

A pair retrieved from memory. Fast, and fragile.

Understood

Seven rows of eight. The answer is a shape you can count.

The second child can rebuild the fact if they forget it, rotate it when the question changes shape, and stretch it when the numbers stop being whole. The first child cannot, and has no way of knowing that yet.

A child who can only recall is fine until the question is phrased in a way they have not seen.

Works
  • Arrays drawn by hand, before any number is written.
  • Asking the child to say the sum in words, as a story.
  • Ten minutes, a few times a week, on the picture alone.
Does not
  • Speed drills, which reward the recall you already have.
  • More worksheets of the same format.
  • Moving to the next topic because the answers are right.

What to listen for

You do not need to test anything. Three questions, asked casually while doing something else, tell you most of what there is to know.

  1. 01
    Can you draw me seven eights?

    A child with the picture reaches for rows or groups. A child without it writes the sum again.

  2. 02
    Is eight sevens the same thing?

    Commutativity is obvious once you can rotate the array, and arbitrary if you cannot.

  3. 03
    What about seven and a half eights?

    The half breaks recall entirely. Only the picture survives it.

If the answers come back thin, nothing is broken. It means the facts arrived before the picture did, which is the ordinary order in most classrooms. The repair is small and it is quick: go back to arrays, to sharing out, to drawing the thing before naming it. Ten minutes a few times a week is enough at this age.

Quick check

Your child answers 7 × 8 = 56 instantly, then stalls on “a rope of 7 metres costs ₹8 per metre”. What is most likely missing?

Checklist
Try it at home

Draw it before you solve it

One problem a day, drawn as a picture first. Say nothing about the answer until the picture is done.

See the maths lesson
Block kit
Grades 4–6MathsCBSE · Cambridge
Common mistake

Correcting the answer before the drawing is finished. It ends the thinking you were trying to see.

Key terms
Array
Objects set out in equal rows and columns, so a product can be seen as a shape.
Commutativity
The rule that 7 × 8 and 8 × 7 give the same result. Obvious once the array can be rotated.
Partitioning
Splitting a number into friendlier parts, so 7 × 8 becomes 7 × 4 twice.
Step by step
  1. 1Read the problem aloud, together

    No pencils yet. The child says what is happening in their own words.

  2. 2Draw it before solving it

    Rows, groups, a bar, anything. The picture comes before the number.

  3. 3Only then write the sum

    Ask which part of the drawing the sum is describing.

Worked example
7 × 8
= 7 rows of 8
= (7 × 4) + (7 × 4)
= 28 + 28
= 56
CBSE
Cambridge
IB
Introduced
Grade 3
Stage 3
PYP 4
Word problems
Grade 4
Stage 4
PYP 4
Assessed by
Final answer
Method marks
Explanation
10 min
Enough, a few times a week, at this age.
Grade 6
Where recall without meaning usually breaks.
3
Questions that tell you which one your child has.
Before

“Wrong. It’s 56. Do the next one.”

After

“Draw me what you counted. Let’s see where it goes.”

Two minutes: the same sum drawn three ways.
PDF Array practice sheet, Grades 4–6One page, twelve problems, space to draw. 240 KB

“Children do not lose arithmetic. They lose the reason it worked.”

Dr J. Banerjee · Institute of Education, [affiliation]
Questions parents ask

No. Facts arriving before the picture is the ordinary order in most classrooms. It only becomes a problem if nothing goes back and fills it in.

Further reading
How children build a picture of numberResearchBar models, explained for parentsGuideThe Grade 6 transition, subject by subjectRao Academy
Over a term
  1. Week 1
    Drawings are slow and often wrong.
  2. Week 3
    Pictures arrive before the sum does.
  3. Week 6
    Word problems stop stalling.
  4. Week 12
    The child explains without being asked.
Over a term, in detail
  1. Week 1
    Drawings are slow, and often wrong

    Expect resistance. The child is being asked to show something they have never had to show.

  2. Week 3
    The picture arrives before the sum

    You will hear counting out loud. That is the model being rebuilt, not a step backwards.

  3. Week 6
    Word problems stop stalling

    The child recognises which operation the situation asks for without being told.

  4. Week 12
    Explaining happens unprompted

    The drawing usually disappears at this point. It has been internalised.

Over a term, alternating
  1. Week 1
    Drawings are slow, and often wrong

    Expect resistance. The child is being asked to show something they have never had to show.

  2. Week 3
    The picture arrives before the sum

    You will hear counting out loud. That is the model being rebuilt, not a step backwards.

  3. Week 6
    Word problems stop stalling

    The child recognises which operation the situation asks for without being told.

  4. Week 12
    Explaining happens unprompted

    The drawing usually disappears at this point. It has been internalised.

Arjun S.

Teaches maths at Rao Academy for Grades 4 to 10. Eleven years in classrooms before that, most of them spent watching children hit the same wall in the same year.