Number Line to 100Rounding, jumping and estimating on a line marked only in tens.2nd GradeYou do not need every number marked. Tens are enough to place anything.1FIND THE TENS EITHER SIDE37 sits between 30 and 40.2IS IT NEARER THE LEFT OR THE RIGHT?37 is much closer to 40.3USE 5 AS THE MIDPOINT35 is exactly halfway. Above it, round up.4JUMP IN TENSTo add 30, make three jumps of ten. Far fewer errors thancounting in ones.WORKED48 + 30 → 58, 68, 7863 rounds to 60 · 67 rounds to 70 · 65 rounds to 70Estimating with a number line is how you check an answer is sensiblebefore you trust it.Number Line to 100learnposters.com
Number Line to 100 — printable math wall chart from LearnPosters. Free vector PDF, US Letter and A4.

Number Line to 100, step by step

You do not need every number marked. Tens are enough to place anything.

  1. FIND THE TENS EITHER SIDE37 sits between 30 and 40.
  2. IS IT NEARER THE LEFT OR THE RIGHT?37 is much closer to 40.
  3. USE 5 AS THE MIDPOINT35 is exactly halfway. Above it, round up.
  4. JUMP IN TENSTo add 30, make three jumps of ten. Far fewer errors than counting in ones.

worked

  • 48 + 30 → 58, 68, 78
  • 63 rounds to 60 · 67 rounds to 70 · 65 rounds to 70

Estimating with a number line is how you check an answer is sensible before you trust it.

Questions about the Number Line to 100 poster

What’s on the Number Line to 100 poster?
4 numbered steps, with a full worked run-through. You do not need every number marked. Tens are enough to place anything. FIND THE TENS EITHER SIDE — 37 sits between 30 and 40.; IS IT NEARER THE LEFT OR THE RIGHT? — 37 is much closer to 40.; USE 5 AS THE MIDPOINT — 35 is exactly halfway. Above it, round up.; JUMP IN TENS — To add 30, make three jumps of ten. Far fewer errors than counting in…. Estimating with a number line is how you check an answer is sensible before you trust it.
Who is the Number Line to 100 poster for?
Number Line to 100 is filed under 2nd Grade (ages 7–8), so it matches what that year asks a child to remember. It is equally useful to an older student revisiting math, and to the parent or teacher answering the question at the kitchen table.
When should you use the Number Line to 100 poster?
Point anywhere on a blank line and ask roughly what number it is. A wall chart earns its place by being glanceable from where the work is happening, so Number Line to 100 belongs on the wall where that math work actually happens, within glancing distance, rather than filed away.
What other posters go with Number Line to 100?
Adding with Regrouping, Addition & Subtraction Facts and am and pm sit alongside Number Line to 100 in the 2nd Grade set. Printed together they make a wall rather than a single sheet, which is how a reference set actually gets used.Adding with RegroupingAddition & Subtraction Factsam and pm
Is the Number Line to 100 poster free to download and print?
Yes. Number Line to 100 downloads as a free PDF with no account, no email and no watermark, like everything else in the 2nd Grade set. Print as many copies as you like for a home, a classroom, a library or a tutoring group; reselling the file is the only thing the licence rules out.Read the licence
What size does the Number Line to 100 poster print at?
Number Line to 100 is a vector PDF laid out for US Letter, and prints on A4 with Fit to page — the same file, no separate download. Because every mark on it is drawn rather than photographed, it stays sharp enlarged to A3, A2 or A1 at a copy shop. Colour carries emphasis only, so a greyscale print of Number Line to 100 loses nothing.Printing guide

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