Equal parts, mass and unit fractions
Answers are for parents and teachers.
1
Draw a rectangle cut into 4 equal parts and another cut into 4 unequal parts. Which one shows fourths? How can you check?
Only the one with equal parts shows fourths. Check by folding, tracing a part on top of another, or counting squares.
2
Choose g or kg: a key, a goat, a spoon, a bag of potatoes. Then write 2 kg 300 g in grams.
A key: g. A goat: kg. A spoon: g. A bag of potatoes: kg. 2 kg 300 g = 2,000 + 300 = 2,300 g.
3
A shop has 5 kg of dates. It sells 2,000 g. How many grams are left? How many kilograms is that?
5 kg = 5,000 g. 5,000 − 2,000 = 3,000 g, which is 3 kg.
4
A shape is cut into 6 equal parts and 5 are shaded. What fraction is shaded? What fraction is not shaded?
5/6 is shaded and 1/6 is not shaded.
5
There are 15 stickers. Find 1/3 of them. Then find 1/2 of 20.
1/3 of 15 is 15 ÷ 3 = 5. 1/2 of 20 is 20 ÷ 2 = 10.