Addition and Subtraction Strategies

What is the best strategy for solving this problem?

• Count Back
• Count On
• Jump Strategy
• Compensation Strategy

Name the strategy used to solve:

• Count On
• Doubles +1
• Jump Strategy
• Guess

Name the strategy used to solve:

• Count On
• Jump Strategy
• Make a Ten
• Compensation Strategy

How would you rearrange this to find the missing number?

• 9 - 15 = ?
• ? - 9 = 15
• 15 - 9 = ?
• 9 + 15 = ?

What strategy is this?

• Compensation Strategy
• Jump Strategy
• Count on
• Split Strategy

Using split strategy, the next step for solving the equation 67 + 42 is:

• 67 + 40 + 2
• 60 + 4 + 2
• 640 + 2
• 670 + 420

• 539
• 600
• 542
• 507

Which of the following is equal to 199 + 31?

• 199 + 40
• 200 + 30
• 62 + 133
• 200 + 29

410 + ? = 956

• 556
• 546
• 456
• 446

What equation can be used to check 819 - 298 = 521?

• 521 + 819 = 298
• 298 + 819 = 521
• 298 - 819 = 521
• 521 + 298 = 819