Intro to the Number Line

The number 2 is closer to 0 than to 5 since it is two units from 0 and three units from 5.

The numbers 4 and 7 are closest to each other since they are three units apart while all the other numbers are more than three units apart.

I can make a ten: 41 + (1 + 19) = 41 + 20 = 61.

I can skip count back by 10 and again by 5. So I have 55 – 10 = 45 and 45 – 5 = 40. 55 – 15 is 40.

The number 65 is halfway between 50 and 80.

No, a number line can start and end at any number.

I start at the number 8 and make 7 single hops or jumps to the right and land on the number 15.

I start at 290 and skip count one hop left of 100 units to land on 190, then I make five hops left of 10 units and land on 140, and then I make one hop left of 5 units to land on 135. 290 – 155 = 135.

The open number line can show different spacing. I can add very large numbers together on an open number line.

I can start at 212. I can start at 200 or 210.