Name: 
 

Lesson 3 - Adding 3-Digit Numbers



 
Match each model with its sum.
a.

grp001-1.jpg
b.

  grp001-2.jpg
c.

grp001-3.jpg
d.

grp001-4.jpg
 

 1. 

376
 

 2. 

569
 

 3. 

888
 

 4. 

699
 
 
Match each sum with the sum of the hundreds, tens, and ones.
a.
700 + 80 + 9 = 789
c.
600 + 80 + 8 = 688
b.
500 + 70 + 6 = 576
d.
800 + 70 + 7 = 877
 

 5. 

261 + 315
 

 6. 

425 + 263
 

 7. 

603 + 274
 

 8. 

582 + 207
 

 9. 

Meaghan has two bottles of water. One bottle contains 474 mL of water. The other bottle contains 537 mL of water. How much water does she have in total?
a.
537 mL + 474 mL = 1001 mL
c.
537 mL + 474 mL = 1111 mL
b.
537 mL + 474 mL = 1011 mL
d.
537 mL + 474 mL = 1211 mL
 

 10. 

Colin has 327 pennies. Anna has 519 pennies. How many pennies do they have altogether?
a.
327 + 519 = 836 pennies
c.
327 + 519 = 846 pennies
b.
327 + 519 = 946 pennies
d.
327 + 519 = 837 pennies
 



 
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