Understand the relationship between addition and subtraction | Exit Quiz | Oak National Academy

Which counters could represent this equation? 3 + 5 = 8

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Answer explanation

Excellent. You need a part with 3 counters and a part with 5 counters. The total altogether for the whole group of counters will be 8.

Tags

CCSS.1.OA.A.1

Which addition equation could represent the counters?

• 3 + 4 = 7

• 7 + 3 = 4

• 4 + 7 = 3

Answer explanation

Excellent. You may have noticed that 3 and 4 are the parts and, when combined, they are equal to the whole, which is 7.

Tags

CCSS.2.OA.A.1

Which counters could represent this equation? 8 – 3 = 5

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Answer explanation

Excellent. You may have realised that 8 is the whole; 3 is a part and 5 is a part.

Tags

CCSS.2.OA.A.1

Tick two equations that represent the beads on the bead string.

• 5 + 2 = 3

• 5 - 2 = 3

• 3 - 2 = 5

• 2 + 3 = 5

Answer explanation

Well done. There are 5 beads in the whole group, 2 beads are red and 3 are white. We can combine 2 and 3 to equal 5, or we can partition the whole of 5 and subtract 2 or 3.

Tags

CCSS.2.OA.A.1

Jun writes this subtraction equation to match this picture. 6 - 2 = 4 What addition equation could he write?

• 6 - 4 = 2

• 4 + 2 = 6

• 6 + 2 = 4

• 2 + 6 = 4

Answer explanation

Well done. When Jun took the whole group of 6 apart, he partitioned it into 2 and 4, so now you can combine 2 and 4 to make 6. 2 + 4 = 6 or 4 + 2 = 6

Tags

CCSS.2.OA.A.1

Jun uses different coloured counters to represent the two parts in a story. He uses 4 red counters and 6 white counters. Which equations could represent this?

• 6 - 4 = 2

• 10 - 4 = 6

• 10 - 2 = 8

• 4 + 6 = 10

Answer explanation

Excellent. There are 4 red counters and 6 white counters, so there must be 10 in the whole group. 10 is the whole, 6 is a part and 4 is a part, so 10 - 4 = 6 and 4 + 6 = 10

Tags

CCSS.2.OA.A.1