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Practice problem

Grade 2 · 2.NBT.A.1

Keep the zero place

Individual task

Practice problem

Grade 2 · 2.NBT.B.5

Make a ten while adding

Individual task

Practice problem

Grade 2 · 2.NBT.B.5

Add or subtract within 100

Individual task

Practice problem

Grade 2 · 2.NBT.B.5

Add or subtract within 100

Individual task

Practice problem

Grade 2 · 2.NBT.B.5

Add or subtract within 100

Individual task

Practice problem

Grade 2 · 2.NBT.B.5

Add or subtract within 100

Individual task

Practice problem

Grade 2 · 2.NBT.B.5

Add or subtract within 100

Individual task

Practice problem

Grade 2 · 2.NBT.B.7

Add and subtract within 1,000

Individual task

Practice problem

Grade 2 · 2.NBT.B.7

Find the missing number

Individual task

Practice problem

Grade 2 · 2.NBT.B.7

Add with an exchange

Individual task

Practice problem

Grade 2 · 2.NBT.B.7

Add and subtract within 1,000

Individual task

Practice problem

Grade 2 · 2.NBT.B.7

Estimate first

Individual task

Practice problem

Grade 2 · 2.NBT.A.2

Count backward by tens

Individual task

Practice problem

Grade 2 · 2.NBT.A.2

Find a missing number in a sequence

Individual task

Practice problem

Grade 2 · 2.NBT.A.2

Count by fives on a number table

Individual task

Practice problem

Grade 2 · 2.NBT.A.4

Compare across a zero

Individual task

Practice problem

Grade 2 · 2.NBT.B.5

Compare two addition strategies

Individual task

Practice problem

Grade 2 · 2.NBT.B.5

Explain an addition strategy

Individual task

Practice problem

Grade 2 · 2.NBT.B.5

Fix a regrouping error

Individual task

Practice problem

Grade 2 · 2.NBT.B.5

Fix a subtraction error

Individual task

Practice problem

Grade 2 · 2.NBT.B.7

Explain an exchange in addition

Individual task

Practice problem

Grade 2 · 2.NBT.B.7

Explain a rename in subtraction

Individual task

Practice problem

Grade 2 · 2.NBT.B.7

Practice a zero-crossing subtraction

Individual task

Practice problem

Grade 2 · 2.NBT.B.7

Estimate before solving

Individual task

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