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This is a self-paced intervention activity for Algebra 1 students to build confidence and accuracy with adding and subtracting positive and negative integers. You may use a reference card and a calculator when appropriate. Focus on identifying the operation, tracking signs, choosing a strategy, and applying integer rules correctly—not speed.

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Look at the signs in `−6 + (−7)`. Are the signs SAME or DIFFERENT?

SAME

DIFFERENT

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Which rule should you use?
Same signs → ADD and KEEP the sign.
Different signs → SUBTRACT and keep the sign of the number farther from zero.

Same signs → ADD and KEEP the sign.

Different signs → SUBTRACT and keep the sign of the number farther from zero.

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Look at the signs in $8 + 5. Are the signs SAME or DIFFERENT?

SAME

DIFFERENT

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Which rule should you use?

Same signs → ADD and KEEP the sign.

Different signs → SUBTRACT and keep the sign of the number farther from zero.

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Solve: $14 + (-9)$ = ____

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Which rule should you use?

Same signs → ADD and KEEP the sign.

Different signs → SUBTRACT and keep the sign of the number farther from zero.

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Look at the signs in $-17 + 6$. Are the signs SAME or DIFFERENT?

SAME

DIFFERENT

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Which rule should you use?

Same signs → ADD and KEEP the sign.

Different signs → SUBTRACT and keep the sign of the number farther from zero.

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Rewrite $-5 - 12$ using KEEP–CHANGE–CHANGE. This is adding the opposite.

$-5 + (-12)$

$-5 + 12$

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Solve: $-5 - 12$ = ____

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Rewrite $16 - 9$ using KEEP–CHANGE–CHANGE. This is adding the opposite.

$16 + (-9)$

$16 + 9$

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Solve: $16 - 9$ = ____

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Rewrite $-3 - (-8)$ using KEEP–CHANGE–CHANGE. This is adding the opposite.

$-3 + 8$

$-3 + (-8)$

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Solve: $-3 - (-8)$ = ____

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Look at the signs in $15 + 4$. Are the signs SAME or DIFFERENT?

SAME

DIFFERENT

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Solve: $15 - (-4)$ = ____

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Look at the signs in $-12 + 7$. Are the signs SAME or DIFFERENT?

SAME

DIFFERENT

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Solve: $-12 - (-7)$ = ____

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PRACTICE 1
Enter the value of $-15 + 7$.

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$-15 + (-2)$

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$12 + (-7)$

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$-6 + 14$

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$-4 - 9$

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$16 - 3$

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$-2 - (-10)$

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$0 - (-7)$

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$-18 + 9$

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$9 - 9$

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A student says: −7 + 4 = −11.
True/False: Is the student’s statement correct?

Nokorɛ

Ɛnyɛ ampa

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What is the correct value of −7 + 4?
Correct: −3

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Free Response: Explain the mistake in 1–2 sentences, focusing on signs and the addition rule.

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A student says: 6 − (−4) = 2.
The student’s statement correct. True/False

Nokorɛ

Ɛnyɛ ampa

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Rewrite 6 − (−4) as addition expression.

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What is the correct andwer to the expression?

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$-9 - (-4)$

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$-3 + (-8)$

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$7 - 12$

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$-6 + 11$

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$-14 - 6$

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$4 - (-17)$

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$-19 + 20$

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$-1 - 19$

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$18 - (-2)$

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N1 Digital Practice — Adding & Subtracting Positive and Negative Integers

N1 Digital Practice — Adding & Subtracting Positive and Negative Integers

Look at the signs in −6 + (−7). Are the signs SAME or DIFFERENT?

Which rule should you use?Same signs → ADD and KEEP the sign. Different signs → SUBTRACT and keep the sign of the number farther from zero.

Look at the signs in $8 + 5. Are the signs SAME or DIFFERENT?

Which rule should you use?

Solve: $14 + (-9)$ = ____

Which rule should you use?

Look at the signs in $-17 + 6$. Are the signs SAME or DIFFERENT?

Which rule should you use?

Rewrite $-5 - 12$ using KEEP–CHANGE–CHANGE. This is adding the opposite.

Solve: $-5 - 12$ = ____

Rewrite $16 - 9$ using KEEP–CHANGE–CHANGE. This is adding the opposite.

Solve: $16 - 9$ = ____

Rewrite $-3 - (-8)$ using KEEP–CHANGE–CHANGE. This is adding the opposite.

Solve: $-3 - (-8)$ = ____

Look at the signs in $15 + 4$. Are the signs SAME or DIFFERENT?

Solve: $15 - (-4)$ = ____

Look at the signs in $-12 + 7$. Are the signs SAME or DIFFERENT?

Solve: $-12 - (-7)$ = ____

PRACTICE 1Enter the value of $-15 + 7$.

$-15 + (-2)$

$12 + (-7)$

$-6 + 14$

$-4 - 9$

$16 - 3$

$-2 - (-10)$

$0 - (-7)$

$-18 + 9$

$9 - 9$

A student says: −7 + 4 = −11.True/False: Is the student’s statement correct?

What is the correct value of −7 + 4?Correct: −3

Free Response: Explain the mistake in 1–2 sentences, focusing on signs and the addition rule.

A student says: 6 − (−4) = 2.The student’s statement correct. True/False

What is the correct andwer to the expression?

$-9 - (-4)$

$-3 + (-8)$

$7 - 12$

$-6 + 11$

$-14 - 6$

$4 - (-17)$

$-19 + 20$

$-1 - 19$

$18 - (-2)$

$-20 + 20$

Look at the signs in −6 + (−7). Are the signs SAME or DIFFERENT?

Which rule should you use?Same signs → ADD and KEEP the sign. Different signs → SUBTRACT and keep the sign of the number farther from zero.

Look at the signs in $8 + 5. Are the signs SAME or DIFFERENT?

Which rule should you use?

Solve: $8 + 5 = ____

Solve: $14 + (-9)$ = ____

Which rule should you use?

Look at the signs in $14 + (-9)$. Are the signs SAME or DIFFERENT?

Look at the signs in $-17 + 6$. Are the signs SAME or DIFFERENT?

Which rule should you use?

Solve: $-17 + 6$ = ____

Rewrite $-5 - 12$ using KEEP–CHANGE–CHANGE. This is adding the opposite.

Look at the signs in $-5 + (-12)$. Are the signs SAME or DIFFERENT?

Which rule should you use?

Solve: $-5 - 12$ = ____

Rewrite $16 - 9$ using KEEP–CHANGE–CHANGE. This is adding the opposite.

Solve: $16 - 9$ = ____

Which rule should you use?

Look at the signs in $16 + (-9)$. Are the signs SAME or DIFFERENT?

Rewrite $-3 - (-8)$ using KEEP–CHANGE–CHANGE. This is adding the opposite.

Look at the signs in $-3 + 8$. Are the signs SAME or DIFFERENT?

Which rule should you use?

Solve: $-3 - (-8)$ = ____

Look at the signs in $15 + 4$. Are the signs SAME or DIFFERENT?

Which rule should you use?

Rewrite $15 - (-4)$ using KEEP–CHANGE–CHANGE. This is adding the opposite.

Solve: $15 - (-4)$ = ____

Look at the signs in $-12 + 7$. Are the signs SAME or DIFFERENT?

Which rule should you use?

Rewrite $-12 - (-7)$ using KEEP–CHANGE–CHANGE. This is adding the opposite.

Solve: $-12 - (-7)$ = ____

PRACTICE 1Enter the value of $-15 + 7$.

$-15 + (-2)$

$12 + (-7)$

$-6 + 14$

Look at the signs in `−6 + (−7)`. Are the signs SAME or DIFFERENT?

Which rule should you use?
Same signs → ADD and KEEP the sign.
Different signs → SUBTRACT and keep the sign of the number farther from zero.

PRACTICE 1
Enter the value of $-15 + 7$.

A student says: −7 + 4 = −11.
True/False: Is the student’s statement correct?

What is the correct value of −7 + 4?
Correct: −3

A student says: 6 − (−4) = 2.
The student’s statement correct. True/False

Look at the signs in `−6 + (−7)`. Are the signs SAME or DIFFERENT?

Which rule should you use?
Same signs → ADD and KEEP the sign.
Different signs → SUBTRACT and keep the sign of the number farther from zero.

PRACTICE 1
Enter the value of $-15 + 7$.

A student says: −7 + 4 = −11.
True/False: Is the student’s statement correct?

What is the correct value of −7 + 4?
Correct: −3

A student says: 6 − (−4) = 2.
The student’s statement correct. True/False