Question

Round these numbers to the nearest tens.
$$28, 32, 52, 41, 39, 48, 64, 59, 99, 215, 1453, 2936$$.

Answer 1

$$28=30$$
$$32=30$$
$$52=50$$
$$41=40$$
$$39=40$$
$$48=50$$
$$64=60$$
$$59=60$$
$$99=100$$
$$215=220$$
$$1453=1450$$
$$2936=2940$$.