Show:
It's a big plus
Negative Nancy
By products
Divide and conquer
Roundabout
100

15+42

57

100

77-23

54

100

4*3

12
100

12/3

4

100

Round to the nearest ten: 9

10

200

28+64

92

200

81-35

46

200

4*6

24

200

49/7

7

200

Round to the nearest ten: 26

30

300

63+49

112

300

92-85

7

300

6*7

42
300

54/6

9

300

Round to the nearest ten:199

200

400

245+643

888

400

636-425

211

400

12*4

48

400
56/7

8

400

Round to the nearest ten: 94

90
500

336+585

921

500

786-687

99

500

7*8

56

500

96/12

8

500

Round to the nearest hundred: 749

700