Q1.
Estimate the weight of the following and put a tick mark (✓) in the appropriate cell. Try to verify if your guess is correct by using a weighing balance.
| Fruits and vegetables | Estimation: Less than 1 kg | Estimation: More than 1 kg | Actual weight: Less than 1 kg | Actual weight: More than 1 kg |
|---|---|---|---|---|
| 6 Bananas | ||||
| 5 Potatoes | ||||
| 10 Tomatoes | ||||
| 15 Onions |
Answer
This is the table printed in the book:
| Fruits and vegetables | Estimation: Less than 1 kg | Estimation: More than 1 kg | Actual weight: Less than 1 kg | Actual weight: More than 1 kg |
|---|---|---|---|---|
| 6 Bananas | ||||
| 5 Potatoes | ||||
| 10 Tomatoes | ||||
| 15 Onions |
First guess, then weigh. Here is a filled sample:
| Fruits and vegetables | Estimation: Less than 1 kg | Estimation: More than 1 kg | Actual weight: Less than 1 kg | Actual weight: More than 1 kg |
|---|---|---|---|---|
| 6 Bananas | ✔ | ✔ | ||
| 5 Potatoes | ✔ | ✔ | ||
| 10 Tomatoes | ✔ | ✔ | ||
| 15 Onions | ✔ | ✔ |
6 bananas: about 120 g each → 6 × 120 g = 720 g → less than 1 kg
5 potatoes: about 120 g each → 5 × 120 g = 600 g → less than 1 kg
10 tomatoes: about 110 g each → 10 × 110 g = 1100 g → more than 1 kg
15 onions: about 100 g each → 15 × 100 g = 1500 g → more than 1 kg
5 potatoes: about 120 g each → 5 × 120 g = 600 g → less than 1 kg
10 tomatoes: about 110 g each → 10 × 110 g = 1100 g → more than 1 kg
15 onions: about 100 g each → 15 × 100 g = 1500 g → more than 1 kg
Why it happens: 1 kg is 1000 g. So we only have to ask one thing each time: is the total more than 1000 g or less than 1000 g?
Tip: Your own fruits may be bigger or smaller than these. That is fine. Weigh them on a balance and write the real answer in the last two columns.