Question

Mark used 6428 blocks build a castle round the number of block to the nearest tens

Answer 1

Answer:

6430

Step-by-step explanation:

round up your 1's digit to 10 and carry your one from the 10 over to the 2 in the tens place, you then add the 1 from the 10 to the 2 in the tens spot and that's how you get ur answer