Converting tenths to hundredths
Express a fraction with denominator 10 as an equivalent fraction with denominator 100 and use this to add fractions with denominators 10 and 100 (e.g. 3/10 + 4/100 = 34/100)
Lesson
Set out your lesson
Rename tenths as hundredths and add the resulting equal-sized fractional units.
Before teaching
Use this short check, then start teaching.
Ask for the meaning of one square on a 100-square grid and an equivalent form of 2/5. Revisit mt_doX1BhmFgk or mt_ebPelt-qAl if these are uncertain. This activity check is inferred, not a change to canonical edges. Source availability is not learner mastery.
Check learner readiness directly; prerequisite availability is not attainment.
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Learning resources
Extra practice links — they do not replace Gakuva’s teaching approach.
Illustrative Mathematics · Practice link — not the full lesson
Tenths and Hundredths
Before you open · source notes
Place-value tenths and hundredths support converting tenths to hundredths. Not every thousandths rename.
Free, no sign-in. A teacher solution is on the same page, so use the student view with your child.
Before you openAsk the learner to rename one tenth as hundredths and say why the value matches.
Opening this link does not save learning or assess mastery.
Source, access and review notes
Public Illustrative Mathematics task page. The .html address responds HTTP 308 to this URL. An anonymous GET of this URL on 2026-11-12 returned HTTP 200 with no login or payment prompt. Where a teacher solution is present, it is on the same page as the student task; this check did not find a separate locked student view. An adult can use the student view section and should not read a solution aloud. Advertising was not observed in the fetched HTML text; that is not a browser, device, or ad-free guarantee. This is a paper or discussion task, not an automatically marked interactive game. Opening the link does not save practice or assess mastery. Diagrams on the page use missing or filename-only alt text, so they are not an accessible image equivalent. Accessibility still depends on an adult describing the picture.
Illustrative Mathematics. “Tenths and Hundredths.” Licensed CC BY-NC-SA 4.0. External task; Gakuva does not copy, host, embed, or redistribute it.
CC BY-NC-SA 4.0 — link only
Check understanding
- Rewrite 7/10 as 70/100
- Calculate 3/10 + 4/100 = 34/100
- Explain why 5/10 = 50/100 using a hundredths grid
“If your child needs to add 3/10 and 17/100, can they rewrite 3/10 as hundredths first — and then add the two fractions together?”
Curriculum record
- Type
- Procedural
- Subject
- Mathematics
- Domain
- Fractions
- Age range
- Ages 9–12
Standards