Grade 4 - Progress in Mathematics

Three or More Addends

3-5

Ms. Pei drove from Chicago to

Kansas City. Then she drove to

Indianapolis and Pittsburgh before

returning to Chicago. How many

miles did she travel?

To find how many miles, add:

499 
 485 
 353 
452.

First, use front-end digits to estimate and adjust your estimate. Then add.

499 
 485 
 353 
 452

400 
 400 
 300 
 400 
 100 
 100 
 100  1800

Add the ones. Add the tens. Add the

Regroup. Regroup. hundreds.

1 2 1 2 1

4 9 9 4 9 9 4 9 9

4 8 5 4 8 5 4 8 5

3 5 3 3 5 3 3 5 3


 4 5 2 
 4 5 2 
 4 5 2

9 8 9 1 7 8 9

19 ones  28 tens  17 hundreds 

1 ten 9 ones 2 hundreds 8 tens 1 thousand 7 hundreds

Ms. Pei traveled 1789 miles.

Study these examples.

1 2 1 1 1 1 1 2

$ 1. 2 7 3 4 , 1 6 1 6 5 7

.3 2 3,7 2 8 8

.0 5 
 7 , 5 6 2 3 4


 .9 7 4 5,4 5 1 
 1 2 4

$2.6 1 8 2 3

Think

1789 is close to 1800.

The answer is reasonable.

485 miles

452 miles

353 miles

KANSASCITY

INDIANAPOLIS

PITTSBURGH

CHICAGO

499 miles

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