Ch.1 Review

Round to the nearest ten or hundred

100

24

20

200

15

20

300

81

80

400

176

180

500

431

430

Estimate Sums

100

   42

+ 36

_______

   40

+ 40

_________

    80

200

   23

+ 45

_____

   20

+ 50

_______

    70

300

   160

+ 120

_________

   200

+ 100

_______

   300

400

   350

+ 450

________

   400 

+ 500

________

    900

500

   278

+ 132

________

   300

+ 100

________

    400 

Estimate Differences

100

  57

- 24

______

  60

- 20

______

   40 

200

  79

- 36

________

  80

- 40

_________

    40 

300

  54

- 22

______

  50

- 20

_______

   30

400

  890

- 220

______

  900

- 200

______

   700

500

  483

- 131

________

  500

- 100

_______

   400 

Use Place Value to Add/Subtract

100

   156

+ 323

_______

479

200

   258

+ 324

________

582

300

   239

+ 570

_________

809

400

  92

- 43

______

49

500

  776

- 384

______

392

Problem Solving

100

Kasha collected 76 fall leaves. She collects 58 more leaves. How many leaves does she have now?

134 leaves

200

Jessica collected 80 stickers. Jim collected 47 stickers. How many stickers did they collect altogether?

127 stickers

300

Alex made 54 cupcakes for the bake sale. Stephanie made 38 cupcakes for the bake sale. About how many more cupcakes did Alex make?

About 10 more cupcakes

400

Max has 96 stamps. Pat has 79 stamps. How many more stamps does Max have than Pat?

17 more stamps

500

Kim sold 127 tickets to the school play. Jon sold 89 tickets. How many more tickets did Kim sell than Jon?

38 more tickets