2.15 Relationship Between Add/Sub

Use your knowledge of the relationship between addition and subtraction to help you determine which math equation below could help you solve: 149 - 72 = ?

• 72 + 77 = 149

• 77 - 72=5

• 149 + 77 = 226

• 72 + 77 = 149

Which math sentence below could help you solve 413 + 145 = ?

• 558 - 413 = 145

• 413 - 145 = 558

• 558 + 145 = 413

• 413 + 558 = 145

Use your knowledge of the relationship between addition and subtraction to help you determine which math equation below could help you solve: 625 - 325 = ?

• 300 + 325 = 625

• 500 - 325 = 175

• 400 + 225 = 625

• 500 + 125 = 625

Use your knowledge of the relationship between addition and subtraction to help you determine which math equation below could help you solve: 811 - 234 = ?

• 234 + 577 = 811

• 811 + 577 = 234

• 811 + 234 = 1045

• 234 - 577 = -343

Use your knowledge of the relationship between addition and subtraction to help you determine which math equation below could help you solve: 156 + 432 = ?

• 588 - 432 = 156

• 156 + 588 = 744

• 588 + 156 = 432

• 432 + 156 = 588