1st Grade Math · Half
Half of 31
Half of 31 is 15½
31 ÷ 2 = 15½
31 is an odd number, so it does not split into two equal whole groups — 15½ means 15 and a half.
How to find half of 31
- 1Half means splitting 31 into 2 equal groups, so work out 31 ÷ 2.
- 231 is an odd number, so it will not split into two equal whole groups — one group always ends up with one more.
- 3Put 15 in each group and there is 1 left over. Split that last one in half too.
- 4So half of 31 is 15½ — 15 and a half. The even numbers either side, 30 and 32, halve to 15 and 16.
Check it: put the two halves back together and you get 15½ + 15½ = 31.
Halving the numbers near 31
| Number | Half of it |
|---|---|
| Half of 26 | 13 |
| Half of 28 | 14 |
| Half of 30 | 15 |
| Half of 32 | 16 |
| Half of 34 | 17 |
Halving is the same as dividing by 2. Odd numbers like 31 always leave one over, so their halves end in a half. Practise it below — the lesson has 5 problems and gives you the answer the moment you try.
Lesson 31 of 84 · Half
Practise halving 31
Work through halving 31 yourself. Odd numbers always have one left over to split.
Ready?
Half of 31
Turn the recipe into the answer.
Full screen — no distractions
Half of 31 — common questions
What is half of 31?
Half of 31 is 15½, which is 15 and a half. 31 is an odd number, so it does not split into two equal whole groups.
How do you work out half of 31?
Share 31 into two groups. Each group gets 15 with 1 left over, and that last one splits in half — so half of 31 is 15½.
Is 31 an even number?
No. 31 ends in 1, so it is odd — and odd numbers never halve into two equal whole groups.
What is 31 divided by 2?
31 ÷ 2 = 15½. Dividing by 2 and halving are the same thing.
Done with math? Try something else
Print the whole Half track
All 1st Grade Half lessons as a printable PDF, with worksheets and answer keys.