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# Column subtraction 4: Lesson 1: bison

## The Maths Bit!

In this exciting lesson, you will need to solve a range of subtraction word problems that feature bison. Try using PAWS to arrive at the right answer!

=  Picture the problem in your mind.

=  Annotate the word problem by highlighting the important information.

W =  Write down the number sentence that needs to be solved.

S  =  Solve the number sentence using an efficient strategy.

Prior learning: Subtract a 3-digit number from a 3-digit number with one or more exchanges.

## Use PAWS, counters and column subtraction to solve the following word problem.

A herd of 1,837 bison were grazing on the grassland plains of Nebraska. Of these bison, 752 were male. The remaining bison were female.

How many female bison were grazing on the grassland plains of Nebraska?

Did you know?

American bison are herbivores, which means they only eat vegetation. Typically, grass and herbs are on the menu, but they will also eat leaves and twigs. They spend between nine and eleven hours a day grazing!