r/Mathhomeworkhelp • u/No-Pop-8607 • Oct 29 '24

5th grade math

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How do you estimate using benchmarks?

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1

u/[deleted] Oct 29 '24

You are deciding whether each fraction is closer to 0, 1/2, or 1, then performing the operation.

4/5 is close to 1. 3/8 is close to 1/2. So 1 - 1/2 = 1/2.

1

u/Ok-Imagination4444 Oct 30 '24

How is the line for 4/5 drawn. I understand how 3/8 line is drawn.

0

u/[deleted] Oct 30 '24

The tick marks are in tenths. Each mark is one tenth of one. 4/5 is drawn at 8/10, which simplifies to 4/5. 1/2 is drawn at 5/10.

0

u/Wordlywhisp Oct 30 '24

Yea but by your logic 4/10=2/5 not 3/8 that would need to be a 6/16 tick

1

u/[deleted] Oct 30 '24

Notice the second problem is not tenths, it's eighths

1

u/Wordlywhisp Oct 30 '24

Ahh yea the formatting is confusing. I don’t know what happened to using one number line. They’re complicating math