Rounding
Doubles
Mental Math Addition
Mental Math Subtraction
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100

Round 24 to the nearest ten.

20

100

4+_=8

4

100

230+22=

252

100

18-9=

9

100

What comes next in this sequence?


3,6,9,12,15, _____

200

Round 267 to the nearest hundred

300
200

What is 7 doubled?

14

200

45 + 45=

90

200

27-3

24

200

What number is incorrect in the following sequence?

4,8,12,16,21,24,

21 should be 20

300

How many 10's in 340

Note: Not how many in the 10's place.

34

300

What is 8 doubled?

16

300

748 + 22=

770

300

139-12=

127

300

What number comes next in the following sequence?

6,12,18,24.30.36,

42

400

Should 959 be rounded to 900 or 1000?

1000

400

What is 9 doubled?

18

400

$1.50 +.55=

$2.05

400

195-62

133

400

What number is incorrect in the following sequence 

8,16,24,34,40,48,56,63

34 should be 32

500

Estimate:  670 + 302=

1000

500

What is 12 doubled?

24

500

$10.64 + $2.11 =

$12.75

500

675-132=

543

500

What comes next?

9,18,27,36,


45