Lesson 10: Word Problems: Subtraction of Three-Digit Numbers

2 3 5 – 1 3 2 1 0 3

There are 235 crickets

and 132 beetles. How

235 Crickets

many more crickets are

there than beetles?

					There are 103 more crickets than beetles.

Exercise 10: Word problems with subtraction of three-digit numbers.

(1)

– .

There are 124 sea turtles

and 241 turtles. How

many more turtles are

there than sea turtles?

		124 sea turtles

(2)

– .

There are 456 yellow bees

and 322 brown bees. How

many more yellow bees are
there than brown bees?

456 yellow bees

(3)

– .

There are 543 purple crabs

and 341 gray crabs. How

many more purple crabs

are there than gray crabs?

		543 purple crabs

(4)

– .

There are 805 brown cows

and 184 gray cows. How

many more brown cows are

there than gray cows?

		805 brown cows

(5)

– .

There are 762 gray alligators

and 206 green alligators.

How many more gray

alligators are there than

762 gray alligators

green alligators?

Lesson 11: Word Problems: Comparing

Two ants climb the steps. The red ant climbs one step for each two steps the brown ant climbs. How many steps will the red ant have climbed, when the brown ant reaches the 3^rd step, if they start at the same time on the 1^st step?

Since the brown ant climbs two steps for every step the red ant climbs:

Exercise 11: Word problems: comparing.

(1) The red ant and brown ant start climbing the steps from the 1^st step at the same time. The brown ant climbs two steps for every step the red ant climbs. Circle the steps that brown ant would reach when the red ant reaches the steps shown in the figures below.