Or search by topic
Use $+ , -, \times , \div$ and $=$ .
For example:
$2$ ⬜ $3 = 6$
is
$2\times 3 = 6$
and
$3$ ⬜ $5 - 2$
is
$3 = 5 - 2$
$16$ ⬜ $18 = 34$
$47$ ⬜ $28 = 19$
$18$ ⬜ $2 = 9$
$30$ ⬜ $10\times3$
All of the number sentences below, except two, have two solutions.
Can you find the symbols to use?
$51$ ⬜ $36$ ⬜ $15$
$45$ ⬜ $5$ ⬜ $9$
$27$ ⬜ $36$ ⬜ $63$
$70$ ⬜ $14$ ⬜ $56$
$7$ ⬜ $5$ ⬜ $35$
$50$ ⬜ $5$ ⬜ $10$
Which two number sentences have only one answer?
Can you see why?