Grade 4 - Progress in Mathematics

(Marvins-Underground-K-12) #1

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

3.1

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