Copy of Open-Up Math: Grade 2 Unit 7 Pre-Test (3/25/2026)

Instrukcije

This pre-test helps show what you already know about adding and subtracting (within <katex>1000</katex>) and explaining your strategies using place value. Do your best—this is to help your teacher plan lessons.

Obavezno

1

Add. Find the sum: $27 + 34 + 18 + 25$.

$94$

$90$

$104$

$84$

2.NBT.6

Obavezno

1

Subtract. Find the difference: $503 - 278$.

$325$

$235$

$215$

$225$

2.NBT.7

Obavezno

1

Two equations below show a correct way to break apart and add $356 + 128$ using place value. Select both.

$356 + 128 = (300+100) + (56+28)$

$(300+50+6) + (100+20+8) = 400 + 60 + 12$

$(300+50+6) + (100+20+8) = (300+100) + (50+20) + (6+8)$

$356 + 128 = 356 + (100 + 30) - 2$

2.NBT.7

Obavezno

1

Use a helpful strategy to add: $49 + 35 + 21 + 15$.

$120$

$100$

$110$

$130$

2.NBT.6

Obavezno

1

True or False: When adding $487 + 156$, you might need to make a new hundred because $80 + 50$ is more than $100$.

Tačno

Netačno

2.NBT.7

Obavezno

1

Explain why this regrouping strategy works for $462 - 178$.
A student says:
“I renamed $462$ as $300 + 150 + 12$.
Then I did $(300-100) + (150-70) + (12-8)$.”
In your explanation, use place value words (hundreds, tens, ones) and tell what was decomposed.

2.NBT.9

Obavezno

1

Solve $38 + 27 + 46 + 19$ in two different ways.
Then explain why both ways give the same answer (use place value and/or a property of operations, like the associative or commutative property).

2.NBT.6

2.NBT.9

Copy of Open-Up Math: Grade 2 Unit 7 Pre-Test (3/25/2026)

Add. Find the sum: $27 + 34 + 18 + 25$.

Subtract. Find the difference: $503 - 278$.

Two equations below show a correct way to break apart and add $356 + 128$ using place value. Select both.

Use a helpful strategy to add: $49 + 35 + 21 + 15$.

True or False: When adding $487 + 156$, you might need to make a new hundred because $80 + 50$ is more than $100$.

Explain why this regrouping strategy works for $462 - 178$.A student says:“I renamed $462$ as $300 + 150 + 12$.Then I did $(300-100) + (150-70) + (12-8)$.”In your explanation, use place value words (hundreds, tens, ones) and tell what was decomposed.

Solve $38 + 27 + 46 + 19$ in two different ways.Then explain why both ways give the same answer (use place value and/or a property of operations, like the associative or commutative property).

Add. Find the sum: $27 + 34 + 18 + 25$.

Subtract. Find the difference: $503 - 278$.

Two equations below show a correct way to break apart and add $356 + 128$ using place value. Select both.

Use a helpful strategy to add: $49 + 35 + 21 + 15$.

True or False: When adding $487 + 156$, you might need to make a new hundred because $80 + 50$ is more than $100$.

Explain why this regrouping strategy works for $462 - 178$.A student says:“I renamed $462$ as $300 + 150 + 12$.Then I did $(300-100) + (150-70) + (12-8)$.”In your explanation, use place value words (hundreds, tens, ones) and tell what was decomposed.

Solve $38 + 27 + 46 + 19$ in two different ways.Then explain why both ways give the same answer (use place value and/or a property of operations, like the associative or commutative property).

Explain why this regrouping strategy works for $462 - 178$.
A student says:
“I renamed $462$ as $300 + 150 + 12$.
Then I did $(300-100) + (150-70) + (12-8)$.”
In your explanation, use place value words (hundreds, tens, ones) and tell what was decomposed.

Solve $38 + 27 + 46 + 19$ in two different ways.
Then explain why both ways give the same answer (use place value and/or a property of operations, like the associative or commutative property).

Explain why this regrouping strategy works for $462 - 178$.
A student says:
“I renamed $462$ as $300 + 150 + 12$.
Then I did $(300-100) + (150-70) + (12-8)$.”
In your explanation, use place value words (hundreds, tens, ones) and tell what was decomposed.

Solve $38 + 27 + 46 + 19$ in two different ways.
Then explain why both ways give the same answer (use place value and/or a property of operations, like the associative or commutative property).