https://www.khanacademy.org/math/cc-seventh-grade-math/cc-7th-negative-numbers-add-and-subtract/cc-7th-add-sub-negative-numbers-with-variables/v/substitution-with-negative-numbers 2021-06-28T22:10:39Z Substitution with negative numbers Practice substituting positive and negative values for variables. video https://cdn.kastatic.org/googleusercontent/On-kIOODsSf2VXuzRf-YR1vrkvIWI8cd9iC8lZS6OB6cScPYCsDU0kSCK8eTLZ_cDLIVj3oE7cclUNEe-bS2x2Q Substitution with negative numbers Practice substituting positive and negative values for variables. https://cdn.kastatic.org/ka-youtube-converted/XkRD9lv_y44.mp4/XkRD9lv_y44.mp4 478 Adding & subtracting negative numbers: variables https://www.khanacademy.org/math/cc-seventh-grade-math/cc-7th-negative-numbers-add-and-subtract/cc-7th-add-sub-negative-numbers-with-variables/e/integer-addition-and-subtraction-with-substitution 2021-06-28T22:10:39Z Substitution with negative numbers Practice plugging in values to evaluate negative number addition and subtraction expressions. Ben exercise https://www.khanacademy.org/math/cc-seventh-grade-math/cc-7th-negative-numbers-add-and-subtract/cc-7th-add-sub-negative-numbers-with-variables/v/understanding-variables-representing-integers-on-number-line 2020-09-16T18:09:55Z Ordering expressions Let's get some practice thinking about adding and subtracting variables representing positive and negative numbers on the number line. video https://cdn.kastatic.org/googleusercontent/vd9fikCly_LbMmwfcQFMQrwav5FiA65g4SH6-z3yOKzDHbOdCqOOyxsfEKQstsQmRz1ERfnF8pcsgo0Tyy_ve3xN Ordering expressions Let's get some practice thinking about adding and subtracting variables representing positive and negative numbers on the number line. https://cdn.kastatic.org/ka-youtube-converted/wRBPzExOH2A.mp4/wRBPzExOH2A.mp4 410 Adding & subtracting negative numbers: variables https://www.khanacademy.org/math/cc-seventh-grade-math/cc-7th-negative-numbers-add-and-subtract/cc-7th-add-sub-negative-numbers-with-variables/e/understanding-addition-and-subtraction-with-negative-numbers 2026-04-07T23:36:17.218592739Z Ordering negative number expressions Practice solving challenging negative number addition and subtraction problems. Number line models, variables, and absolute value come together to push your knowledge of negative numbers even deeper (maybe even below zero!). Sharon F. exercise https://www.khanacademy.org/math/cc-seventh-grade-math/cc-7th-negative-numbers-add-and-subtract/cc-7th-add-sub-negative-numbers-with-variables/e/one-step-equations-with-negatives--add---subtract- 2023-07-31T23:04:20.970726205Z One-step equations with negatives (add & subtract) Solve one-step addition and subtraction equations that include negative numbers. Lindsay exercise