Lesson 8 of 15
Decimals at the shop and on the scale
Show on a big screenA scale shows 1.35 kg, kilograms. The shop slip says 1350 g, grams. Are they the same rice?
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The rule
Yes. They are the same amount of rice. 1350 ÷ 1000 = 1.35.
Small unit to big unit? Divide. Divide by how many small units make one big one.
Big unit to small unit? Multiply by the same number. Here L means litres and mL means millilitres. 0.45 L × 1000 = 450 mL.
| Written small | How many make one big | Written big |
|---|---|---|
| 275 paise | 100 paise in a rupee | ₹2.75 |
| 135 cm | 100 cm in a metre | 1.35 m |
| 2500 g | 1000 g in a kilogram | 2.5 kg |
| 450 mL | 1000 mL in a litre | 0.45 L |
Money is written to the hundredths column. That is because 100 paise make a rupee. A shop writes ₹8.50, not ₹8.5.
Check the size. 450 mL is under a litre. So 0.45 L is sensible, and 45 L is not.
Try the lab to finish this lesson.