Number Stories
Rounding
Ball Park Estimates
2 Digit Addition
100

I had 9 winter hats but I lost 2. How many hats do I have left?

7 hats

100

Round the number to the nearest 10!

9

10

100

Make a Ball Park Estimate for the following number sentence:

34+8

30+10=40

100

20+35=?

55

200

Mrs. Matthes went skiing for 18 minutes on Monday. On Tuesday she skied for 31 minutes. How long did she ski?

52 minutes

200

Round the number to the nearest 10!

62

60

200

Make a Ball Park Estimate for the following number sentence:

66+32

70+30=100
200

12+37=?

49
300

Ms. Arnold baked 25 cookies. Skylar ate 4 of them. So, Ms. Arnold made 13 more. How many cookies does Ms. Arnold have now?

34 cookies

300

Round the number to the nearest 100!

849

800

300

Make a Ball Park Estimate for the following number sentence:

78+73

80+70=150

300

48+91=?

139

400

You were outside and caught 13 snowflakes on your tongue. Your friend came outside and caught 4 on their tongue. How many more snowflakes did you catch?

9 snowflakes

400

Round the number to the nearest 100!

686

700

400

Make a Ball Park Estimate for the following number sentence:

3+95

0+100=100

400

126+53=?

179

500

The temperature was 41 degrees outside. Overnight, the temperature dropped 12 degrees, but by recess has warmed up 17 degrees. What temperature is it when you go outside to recess? 

46 degrees

500

Round the number to the nearest 100!


961

1000

500

Make a Ball Park Estimate for the following number sentence:

98+39

100+40=140

500

159+84=?

243

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