Topic 2 - Addition/Subtraction

Addition

100

235 + 456 = ?

691

200

1,239 + 2,975 = ?

4,214

300

3,890 + 2,765 = ?

6,655

400

24,684 + 98,765 = ?

123,449

500

23,768 + 16,908 + 56,742 = ?

97,418

Subtraction

100

Find Difference and check work with addition.

2,345 - 1,231 = ?

1,114

1,114 + 1,231 = 2,345

200

Find difference and check work with addition.

7,843 - 5,036 = ?

2,807

2,807 + 5,036 = 7,843

300

Find difference and check work with addition.

23,751 - 13,906 = ?

9,845

9,845 + 13,906 = 23,751

400

Find difference and check work with addition.

46,091 - 24,831 = ?

21,260

21,260 + 24,831 = 46,091

500

Find difference and check work with addition.

95,026 - 80,947 = ?

14,079

14,079 + 80,947 = 95,026

Associative/Commutative Properties

100

Complete the equation to make it true.

(4,000 + 25) +50 = __?___ + (25 + 50)

4,000

200

Rewrite this equation using commutative property.

1,000 + 3,450 + 2,000 = n

change order of the numbers

300

Complete the equation to make it true.

5,098 + (56 + 900) = (5,098 + 56) + __?__

900

400

Rewrite this equation using commutative property.

3,890 + 345 + 123 = n

change the order of the numbers

500

What property is used in this equation?

(4,560 + 345) + 123 = 4,560 + (345 + 123)

Associative property

Story Problems

100

Nick's had 34 customers on Monday, 56 on Tuesday and 78 on Wednesday.  Write and solve an equation on how many total customers Nick's had.  LABEL!!!

34+56+78 = 168 customers

200

Fred bought 235 Harry Potter lego's, 789 Star War lego's and 900 City Lego's.  Write and solve an equation to find out how many Lego's he bought.  LABEL!!!

235+789+900= 1,924 lego's

300

Hailey and Jordan ran 200 miles last year.  This year they have run 156 miles.  What is the difference in miles they ran?  LABEL!!!

200 - 156 = 44 miles

400

Pugsly ate 345 pounds of food in October, 210 pounds in September and 409 pounds in August.  Estimate and solve how many pounds of food he has eaten in 3 months. LABEL!!!

300 + 200 + 400 = 900 pounds

500

Carson ate 16 hotdogs last year and Trig ate 14 hot dogs last year.  Carson ate 14 hot dogs this year and Trig ate 64 hot dogs this year.  What is the difference between THIS year and LAST year for hot dogs ate?

This year 64 + 14 = 78 hot dogs

Last year 16 + 14 = 30 hot dogs

78 - 30 = 48 hot dogs

Rounding

100

Round to nearest 1,000 place and find sum.

3,456 + 5,909 = ?

3,000 + 6,000 = 10,000

200

Round to the highest place value and find difference.

5,890 - 4,368 = ?

6,000 - 4,000 = 2,000

300

Round to ten thousands place and find sum.

12,456 + 34,509 = ?

12,000 + 35,000 = 47,000

400

Round to highest place value and find difference.

12,345 - 6,789 = ?

12,000 - 7,000 = 5,000

500

Estimate and solve.

34,690 + 24,908 + 12,843 = ?

30,000 + 20,000 + 10,000 = 60,000