DHS REC Math Challenge

Addition

100

MENTAL MATH

14+9

23

200

65+37

102

300

152+66

118

400

MENTAL MATH

142+55

197

500

MENTAL MATH

363+57

420

Subtraction

100

MENTAL MATH 

15-7

8

200

MENTAL MATH

22-14

8

300

156-59

97

400

452-236

216

500

MENTAL MATH

221-42

179

Multiplication

100

MENTAL MATH

5x5

25

200

MENTAL MATH

9X7

63

300

21x5

105

400

52x12

624

500

543x101

54,843

Division

100

MENTAL MATH 

12 / 3

4

200

MENTAL MATH

 

21 / 3

7

300

120 / 6

20

400

224 / 4

56

500

362 / 6

60 R3

RANDOM

100

What is the sum of two numbers called? 

Addition

200

42+15+49= 

106

300

96-23-8= 

65

400

50% of 80

HINT: 50% is half of 100% 

100% of something is ALL of it, so 50% of it would be _____

40

500

5x5x5=

HINT: Think of quarters 

125