Grade 3 Maths Worksheets: (12.7 Word Problems on Grams and ... - Free Printable

Explanation:
Let’s solve each problem one by one, carefully.

Problem 1:
Ali has 450 kg of wheat. He sold 243 kg.
How much is left?
→ Subtract what he sold from what he had:
450 − 243 = ?
Let’s do it step by step:
450 − 200 = 250
250 − 43 = 207
So, 207 kg left.

✔ Check: 207 + 243 = 450 ✔️

Problem 2:
Weights:
- Pencil: 25 g
- Eraser: 30 g
- Ruler: 15 g
- Markers: 490 g
- Pencil case: 710 g

Add them all:
Start with small ones:
25 + 30 = 55
55 + 15 = 70
Now add bigger ones:
70 + 490 = 560
560 + 710 = 1,270 g

✔ Check: 25+30=55; 55+15=70; 70+490=560; 560+710=1,270 ✔️

Problem 3:
One goat = 40 kg 340 g
We want weight of 3 goats.
First, convert to grams to avoid confusion:
1 kg = 1,000 g
So 40 kg 340 g = (40 × 1,000) + 340 = 40,000 + 340 = 40,340 g
Now multiply by 3:
40,340 × 3 =
40,000 × 3 = 120,000
340 × 3 = 1,020
Total = 120,000 + 1,020 = 121,020 g

Now convert back to kg and g:
121,020 ÷ 1,000 = 121 kg and 20 g
(because 121 × 1,000 = 121,000; remainder 20)

✔ So answer: 121 kg 20 g

Problem 4:
Emma is 16 kg heavier than her brother.
Brother weighs 87 kg.
So Emma = 87 + 16 = 103 kg.

✔ Check: 103 − 87 = 16 ✔️

Problem 5:
Bowl weighs 1 kg.
When filled with sand, total weight = 5 kg 250 g.
We want just the sand weight.
Subtract bowl weight:
5 kg 250 g − 1 kg = 4 kg 250 g.

✔ Check: 4 kg 250 g + 1 kg = 5 kg 250 g ✔️

Now let’s list all final answers clearly:

1. 207 kg
2. 1,270 g
3. 121 kg 20 g
4. 103 kg
5. 4 kg 250 g

Final Answer:
1. 207 kg
2. 1270 g
3. 121 kg 20 g
4. 103 kg
5. 4 kg 250 g