Represent a change story using addition and subtraction symbols | Exit Quiz | Oak National Academy

Describe the change.

• Positive change

• Negative change

• No change

Answer explanation

You correctly identified a negative change.

Tags

CCSS.7.NS.A.1C

Which of the these would result in a negative change to the number of marbles in the bag?

• Put eight in, take three out.

• Put three in, take eight out.

• Add five, take away seven.

• Add seven, take away five.

• Put five in, remove nine.

Answer explanation

Even though the language varied, you were able to work out which of these would result in a negative change.

Tags

CCSS.7.NS.A.1C

Jun is adding in and taking out one pound coins from his piggy bank. Which of these would result in a negative difference to the amount of money in the piggy bank?

• Put £3 in, take £5 out.

• Put £5 in, take £3 out.

• Add £7, take £9 out.

• Add £9, take £7 out.

• Put £13 in, take £20 out.

Answer explanation

Even though the language varied, you were able to work out which of these would result in a negative difference, or negative change.

Tags

CCSS.7.NS.A.1C

People are getting on and off a bus at different stops. The bus already has a number of passengers. Which of these would result in a negative change?

• Nine got on, 13 got off.

• 13 got on, nine got off.

• Nobody got on, three got off.

• Three got on, nobody got off.

• Nobody got on, nobody got off.

Answer explanation

Even when negative values were involved, you were able to decide which of the scenarios would result in a negative change.

Tags

CCSS.7.NS.A.1A

Jun and Sofia are playing the marbles game. They have used the equation 5 − 7 = −2. What does each of the numbers represent?

• −2

• the number of marbles taken out of the bag

• 5

• the change in the number of marbles

• 7

• the number of marbles added to the bag

Answer explanation

You understood the different parts of an equation involving a negative change.

Tags

CCSS.7.NS.A.1B

Jun adds £4 to his piggy bank and takes £6 out. Which of the following equations describes this?

• £6 − £4 = £2

• £4 − £6 = −£2

• −£2 = £4 − £6

• £4 − £2 = −£6

Answer explanation

You were able to say which equations represented this negative change, even when the order of the equation was switched.

Tags

CCSS.7.NS.A.1C