3.1 Adding/Subtracting/Rounding

John has 547 cars in his collection. He has two different types of cars. 235 are blue and the others are red. Which strategy represents the total number of cars he has?

• 500+40+7

  -200+30+5

  _________

  300+10+2

• 547+235=782

• 547-235=782

• 500+40+7

  -300+20+2

  ______________

  200+20+5

Steve has 396 stickers. Some of them are animal stickers and the rest are funny face stickers. How many of each kind can Steve have?

Write an equation to show your answer.

15 rounded to the nearest tens is 10

• true

• false

45 rounded to the nearest tens is 50

• true

• false

32 rounded to the nearest tens is 40

• true

• false

64 rounded to the nearest tens is 60

• true

• false

89 rounded to the nearest tens is 100

• true

• false

Round to the nearest hundreds to estimate about how many total tickets the items cost.

The items cost about ____ tickets.