Number Lines - Up to 100
š£ļø Welcome to the number highway! Number lines look a little different when they go all the way to 100. Sometimes they zoom out and skip numbers!
Concept
We used small number lines (1-20) to jump like frogs. But a number line that goes to 100 is too long for a single page! We need to zoom out. šÆ **"Zoomed Out" Number Lines:** A number line up to 100 might not show every single number! Instead of counting by 1s... it might count by 10s! * Look at the tick marks: 10 --- 20 --- 30 --- 40 šÆ **Finding the Middle (The 5s):** If a number line only shows 10, 20, 30... where is the number 15? It's exactly halfway in the middle between 10 and 20! Sometimes there is a medium-sized tick mark right in the middle to help you find the 5s. When you look at a big number line, the first thing you must do is figure out the pattern. Is it going by 1s? 5s? 10s? Once you crack the pattern, you can figure out where any empty point is on the line.
Try it
Read the number highway! **Instructions:** Look at the number line rules and find the missing stop! **Problem 1:** A number line has big marks counting by tens. You see: 30 ... 40 ... 50 ... [Blank Box] ... 70. What number belongs in the blank box? * Answer: ___ **Problem 2:** You are trying to find the number 25 on a number line that only shows 20 and 30. Where should you put your dot? A) Very close to the 20 B) Very close to the 30 C) Exactly in the middle between the 20 and 30 **Problem 3:** A number line counts by ones, but it starts in the middle! It says: 88, 89, 90, [Blank Box], 92. What belongs in the blank box? * Answer: ___ **Problem 4:** If a number line starts at 0 and the very first tick mark is 10, what is the second tick mark? * Answer: ___