Explain how a combination of different parts can be equivalent to the same whole | Starter Quiz | Oak National Academy

Select the values that could be labelled as parts in this equation: 500 = 150 + 350

• 500

• 150

• 350

Answer explanation

150 and 350 are parts and 500 is the whole.

Which of the following expressions are equivalent to 5 + 5 + 5?

• 1 × 5

• 5 × 3

• 3 × 5

• 5 × 5

Answer explanation

Equivalent means the same amount or value. 5 + 5 + 5 is equivalent to 3 × 5 or 5 × 3

0.3 + 0.1 + 0.6 = 1 Which other combination of three parts has the same whole?

• 0.2 + 0.2 + 0.6

• 0.4 + 0.2 + 0.7

• 0.1 + 0.5 + 0.4

• 0.3 + 0.2 + 0.6

Answer explanation

For example, you may have reasoned that 0.2 + 0.2 + 0.6 = 1 because the first part decreased by 0.1 and the second part increased by 0.1

Complete the statement: If I know 1.7 + 8.3 = 10 then I know (a)   + 7.3 = 10

Answer explanation

1.7 + 8.3 = 10 so 2.7 + 7.3 = 10 The second addend or part decreased by 0.1 so the first part needed to increase by 0.1 to keep the whole the same.

Select two addends which sum to make 1,000

• 175

• 275

• 300

• 675

• 725

Answer explanation

725 + 275 = 1,000

Lucas and some of his friends drank some water. Lucas drank 0.25 l of water, Sofia drank 130 ml, and Andeep drank 0.3 l. How much water did they drink in total? Give your answer in ml. (a)   ml

Answer explanation

250 ml + 130 ml + 300 ml = 680 ml Remember that there are 1,000 ml in one litre so 0.25 l = 250 ml