What’s on the Working Out Elapsed Time poster?

5 numbered steps. Do not subtract 2:45 from 4:20 in a column. Jump along a time line instead. START AT THE FIRST TIME — Write it at the left of a blank line.; JUMP TO THE NEXT WHOLE HOUR — From 2:45, jump 15 minutes to 3:00.; JUMP WHOLE HOURS — 3:00 to 4:00 is one hour.; JUMP THE LAST MINUTES — 4:00 to 4:20 is 20 minutes.; ADD THE JUMPS — 15 min + 1 hr + 20 min = 1 hour 35 minutes.. Time is base 60, not base 10. That is exactly why column subtraction goes wrong.

Who is the Working Out Elapsed Time poster for?

Working Out Elapsed Time is filed under 3rd Grade (ages 8–9), 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 Working Out Elapsed Time poster?

Use a number line of time. Subtracting clock times causes more errors than anything else. A wall chart earns its place by being glanceable from where the work is happening, so Working Out Elapsed Time belongs on the wall where that math work actually happens, within glancing distance, rather than filed away.

What other posters go with Working Out Elapsed Time?

Right, Acute, Obtuse, Area and Perimeter and Which Operation? sit alongside Working Out Elapsed Time in the 3rd Grade set. Printed together they make a wall rather than a single sheet, which is how a reference set actually gets used.

Is the Working Out Elapsed Time poster free to download and print?

Yes. Working Out Elapsed Time downloads as a free PDF with no account, no email and no watermark, like everything else in the 3rd 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.

What size does the Working Out Elapsed Time poster print at?

Working Out Elapsed Time 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 Working Out Elapsed Time loses nothing.

Working Out Elapsed Time — free printable poster

Working Out Elapsed Time — printable math wall chart from LearnPosters. Free vector PDF, US Letter and A4.

Working Out Elapsed Time, step by step

Do not subtract 2:45 from 4:20 in a column. Jump along a time line instead.

START AT THE FIRST TIMEWrite it at the left of a blank line.
JUMP TO THE NEXT WHOLE HOURFrom 2:45, jump 15 minutes to 3:00.
JUMP WHOLE HOURS3:00 to 4:00 is one hour.
JUMP THE LAST MINUTES4:00 to 4:20 is 20 minutes.
ADD THE JUMPS15 min + 1 hr + 20 min = 1 hour 35 minutes.

Time is base 60, not base 10. That is exactly why column subtraction goes wrong.

Questions about the Working Out Elapsed Time poster

What’s on the Working Out Elapsed Time poster?: 5 numbered steps. Do not subtract 2:45 from 4:20 in a column. Jump along a time line instead. START AT THE FIRST TIME — Write it at the left of a blank line.; JUMP TO THE NEXT WHOLE HOUR — From 2:45, jump 15 minutes to 3:00.; JUMP WHOLE HOURS — 3:00 to 4:00 is one hour.; JUMP THE LAST MINUTES — 4:00 to 4:20 is 20 minutes.; ADD THE JUMPS — 15 min + 1 hr + 20 min = 1 hour 35 minutes.. Time is base 60, not base 10. That is exactly why column subtraction goes wrong.
Who is the Working Out Elapsed Time poster for?: Working Out Elapsed Time is filed under 3rd Grade (ages 8–9), 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 Working Out Elapsed Time poster?: Use a number line of time. Subtracting clock times causes more errors than anything else. A wall chart earns its place by being glanceable from where the work is happening, so Working Out Elapsed Time belongs on the wall where that math work actually happens, within glancing distance, rather than filed away.
What other posters go with Working Out Elapsed Time?: Right, Acute, Obtuse, Area and Perimeter and Which Operation? sit alongside Working Out Elapsed Time in the 3rd Grade set. Printed together they make a wall rather than a single sheet, which is how a reference set actually gets used.Right, Acute, Obtuse Area and Perimeter Which Operation?
Is the Working Out Elapsed Time poster free to download and print?: Yes. Working Out Elapsed Time downloads as a free PDF with no account, no email and no watermark, like everything else in the 3rd 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 Working Out Elapsed Time poster print at?: Working Out Elapsed Time 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 Working Out Elapsed Time loses nothing.Printing guide

Working Out Elapsed Time, step by step

Questions about the Working Out Elapsed Time poster

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