Times 2: double 26 to 50.
Multiplication to 100
Multiplication to 100 practice, from 8 × 7 to 6 × 15 = 90 and 70 × 80 = 5600: doubling 26 to 50, partitioning and every times tables fact from 1 to 10.
Your child can start here once they can multiply up to 50 and divide numbers up to 50. That includes facts like 42 ÷ 6 and 48 ÷ 8, the same knowledge as 6 × 7 and 6 × 8, and a child who has them from both sides has far less to work out in a sum like 6 × 15.
Usually taught in Year 3–4 in England and Wales, around ages 7 to 9. Every child goes at their own pace; this is a guide, not a requirement.
The first of 8 exercises in this topic. See them all
What it looks like for your child
With one exercise from this topic as the example: Double.
1
2
3
4
How it fits together
The arrows point to what can be done next. Whatever sits inside a box belongs to it.
Needed first
Multiplication
Can come next
first this, then that belongs to
Split the big number: 4 × 17 = 4 × 10 + 4 × 7.
Doubling backwards is halving: ? → 96, so half of 96.
Against the clock: how many can your child do in sixty seconds?
The same sums, but a different number missing each time: the result or one of the two numbers.
The same sums to 100, with zeros on the end: if you know 8 × 2 = 16, you also know 80 × 2 = 160 and 80 × 20 = 1600.
Which two numbers give this result? The order does not matter.
A long round of 40 mixed sums to finish.
- Times and divide — on the Division to 100 page
- Times and divide: big round — on the Division to 100 page
- Quick: times and divide — on the Division to 100 page
- Plus, minus, times and divide — on the Division to 100 page
- All four: big round — on the Division to 100 page
- Quick: all four — on the Division to 100 page
Why it matters
Up to 100, everything comes together. All the times tables from 1 to 10 fit in here, along with sums like 3 × 27 that your child has to break up themselves. A child who has mastered this has the foundation for working with money and measures, and later for written column multiplication.
With tens, hundreds and thousands, the numbers get really big. 60 × 90 = 5400 looks large, but it is simply 6 × 9 with two zeros on the end. Seeing that takes the fear out of big numbers.
How to approach it
For a sum like 4 × 23, think in tens: 4 × 20 = 80 and 4 × 3 = 12, making 92. First on paper, then more and more often in the head, until writing it down feels unnecessary.
If a particular times table is still shaky, go back to that table's page for a while. A gap in the 7 times table slows down every bigger sum with a seven in it, and a gap like that is quicker to fill than to work around.
When is it secure?
All 10 right in one round, and no more than 35 seconds altogether. Around 3.5 seconds a sum shows your child is no longer counting.