Tenths and Hundredths Together
Aligned to 4.NF.C.5 — Common Core State Standards for Mathematics.
What this lesson teaches
One tenth is the same as ten hundredths. To add a fraction in tenths to a fraction in hundredths, first rename the tenths as hundredths, then add because they now match.
Worked example
3/10 + 25/100. First rename 3/10 as hundredths: multiply top and bottom by 10 to get 30/100. Now both are hundredths: 30/100 + 25/100 = 55/100.
Practice questions
- Rename 6/10 as hundredths.
- Add: 4/10 + 37/100.
- Add: 7/10 + 9/100 and write the total in hundredths.
Watch the lesson
Every lesson comes with a video taught in English and Spanish — the same video the QR code in the printed workbook opens.
▶ Watch this lessonEn español
Decimos y centesimos juntos
Un decimo es igual a diez centesimos. Para sumar una fraccion en decimos con una fraccion en centesimos, primero cambia los decimos a centesimos y luego suma, porque ahora coinciden.
Ejemplo: 3/10 + 25/100. Primero cambia 3/10 a centesimos: multiplica arriba y abajo por 10 para obtener 30/100. Ahora ambas son centesimos: 30/100 + 25/100 = 55/100.
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