Using Front End Estimation to Add

Use front end estimation and match each of the following questions to their sums.

• 1 100

• 1 224 + 3 567

• 10 000

• 7 456 + 3 892

• 1 500

• 542 + 623

• 5 000

• 3 678 + 2 576

• 4 000

• 678 + 987

4 687 + 2 873=

Estimating is when you use information you know to find a solution that is close to the actual (a)   .​

• answer
• picture
• guess

Use front end estimation to match each of the following questions to the correct estimation.

• 6 000

• 400 + 399

• 700

• 578 + 321

• 500

• 4 352 + 2 345

• 9 000

• 1 456 + 8 654

• 800

• 376 + 213

How do you feel about doing front end estimation so far?

• 1: I am lost and have so many questions.

• 2: I am beginning to understand it, but I still have a number of questions.

• 3: I understand it and I still have one or two questions.

• 4. 4. I understand it really well and could teach someone else what it means.

Write your own addition sentence and also write the estimate using front end estimation.

4 543 + 2 367→ (a)  

• 6 000
• 7 000
• 5 000
• 6 500

3 030 + 3 405

The estimate for 5 789 + 7 890 is

• 12 000

• 11 000

• 1200

• 1 300

Put each expression with the estimate you would get when using front-end estimation.

Groups:

(a) 6 000

,

(b) 600

,

(c) 14 000

,

(d) 800

• 309 + 367

• 478 + 401

• 287 + 678

• 7 234 + 7 986

• 578 + 123

• 8 976 + 6 744

• 567 + 324

• 3 989 + 3 123

• 245 + 498

• 9 523 + 5 123

• 5 786 + 1 345

• 4 567 + 2 345