1st Grade Math · Half
Half of 78
Half of 78 is 39
78 ÷ 2 = 39
How to find half of 78
- 1Half means splitting 78 into 2 equal groups, so work out 78 ÷ 2.
- 2Split 78 into its tens and its ones: 70 and 8.
- 3Halve each part on its own — half of 70 is 35, and half of 8 is 4.
- 4Add the two halves back together: 35 + 4 = 39.
Check it: put the two halves back together and you get 39 + 39 = 78.
Halving the numbers near 78
| Number | Half of it |
|---|---|
| Half of 74 | 37 |
| Half of 76 | 38 |
| Half of 78 (this page) | 39 |
| Half of 80 | 40 |
| Half of 82 | 41 |
Halving is the same as dividing by 2, and the same as sharing 78 equally between two people. It is also how you undo doubling: 39 doubled is 78. Practise it below — the lesson has 5 problems and gives you the answer the moment you try.
Lesson 78 of 84 · Half
Practise halving 78
Work through halving 78 yourself. Halving the tens and the ones separately makes any two-digit number easy.
Ready?
Half of 78
Half of half is a quarter. Prove it with cake.
Full screen — no distractions
Half of 78 — common questions
What is half of 78?
Half of 78 is 39. Halving means splitting a number into two equal groups, so half of 78 is 78 ÷ 2 = 39, and 39 + 39 = 78.
How do you work out half of 78?
Split 78 into tens and ones, halve each part, then add them back together. 70 halves to 35 and 8 halves to 4, and 35 + 4 = 39.
Is 78 an even number?
Yes. 78 ends in 8, so it is even, which is why it halves to the whole number 39.
What is 78 divided by 2?
78 ÷ 2 = 39. 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.