A construction worker needs to weigh blocks for his construction job. The blocks weigh 157 kg. What is the weight of the blocks rounded to the nearest ten?

What is the rounded number of 83 to the nearest ten?

Round 537 to the nearest hundred.

Which number is rounded correctly? 

Round 865 to the nearest 10.

Jackson has a collection of toy cars. He rounds the total amount of toy cars to the nearest 10 and gets 70. Which number shows the amount of toy cars that could be in his collection?