Grade 4 - Progress in Mathematics

Compute Customary Units

6-3

Last month a sunflower was

4 feet 7 inches tall. Then it grew

1 foot 8 inches taller. How tall

is the sunflower now?

To find how tall it is now,

add: 4 ft 7 in. 
1 ft 8 in.

Add the smaller units first. Rename units as needed.

4 ft 7 7 in.


1 ft 7 8 in.


5 ft 15 in. 5 ft 
1 ft 
3 in.6 ft 3 in.

The sunflower is 6 ft 3 in. tall now.

A lilac stem was 7 feet 7 inches tall.

Sam pruned 2 feet 5 inches off the stem.

How tall was the stem after pruning?

To find how tall, subtract: 7 ft 7 in. 2 ft 5 in.

Subtract the smaller units first. Rename units as needed.

7 ft 7 in.

2 ft 5 in.


5 ft 2 in. The stem was 5 ft 2 in. tall after pruning.

Study these examples.


 1 8 yd 1 ft 4 ft 11 in.


 1 2 yd 2 ft 4 ft 19 in.


10 yd 3 ft 10 yd 
1 yd11 yd 4 ft 1 2 in.

15 in.12 in.
3 in.

 1 ft
3 in.

3 ft1 yd

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