Learning Objective We are learning how to add numbers with more than 4 digits, using the formal written method of column addition (more than one exchange).

Challenge 1Read each word problem carefully and highlight the important information. Solve each word problem using column addition.

1) Adult male grey whales are smaller than adult female grey whales. In the North Pacific Ocean, a female grey whale, who weighed 33,345 kilograms, was swimming alongside her mating partner, who weighed 23,725 kilograms.

What was the combined weight of the two grey whales?

Number sentence: __________________________Answer:

2) Thousands of tiny whale lice were eating the algae that was growing on the bodies of a large pod of migrating humpback whales. There were 35,673 whale lice feeding on the pod’s female whales and 17,422 whale lice feeding on the pod’s male whales.

How many whale lice were feeding altogether?

Number sentence: __________________________Answer

3) In the last decade of the 20th century, 43,970 litres of whaleoil (created from the blubber of whales) was used to make oil lamps, while 26,982 litres of whale oil was used to make soap.

How many litres of whale oil was used to make these two products in this decade?

Number sentence: __________________________Answer:

4) A blue whale dived into a shoal of krill with its mouth wide upon. Using its baleen it swallowed 23,478 krill in its first gulp, 23, 678 krill in its second gulp and 24,567 krill in its third gulp.

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What was the total number of krill swallowed by the blue whale’s first and third gulps?

Number sentence: __________________________Answer:

5) In the eightieth year of its life, a blue whale released a staggering 72,856 litres of liquid whale poo into the ocean. In its eighty-first year, it released 69,226 litres of whale poo into the ocean.

How many litres of whale poo did the blue whale release into the ocean during this two year period?

Number sentence: __________________________Answer:

Challenge 2Using your knowledge of whales and some of the words from the Word Wall, write your own word problem that requires more than one exchange. Show the solution to your word problem using column addition.

whale migrate

weight

whaling surface

krill

swallow

whale lice

Word Wall

pod

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