math facts
rounding to 10
rounding to 100
area
time
100

12+11

23

100

18

20

100

486

500

100

find the area of a rectangle that is 10 units by 8 units?

80 units squared

100

It is 2:30. What time will it be in 15 minutes?

2:45

200

23-10

13

200

61

60

200

266

300

200

find the perimeter of a rectangle that is 6 inches by 2 inches?

16 inches

200

It is 1:17.  What time is it in 20 minutes?

1:37

300

8x9

72

300

67

70

300

521

500

300

What is the area of a rectangle that is 5 inches by 9 inches?

45 inches squared.

300

It is 4:37.  Jill left her house 20 minutes ago.  What time did she leave?

4:17

400

64/8

8

400

48

50

400

883

900

400

Find the perimeter of a rectangle that is 8 cm by 4 cm?

24 cm

400

It is 9:15 pm.  What time will it be in an hour and a half? 

10:45

500

12x12

144

500

98

100

500

979

1000

500

Find the area of the playground that is 100 ft by

200 ft.

20,000 ft squared.

500

It is 4:15?  What time was it an hour and 25 minutes ago?

2:50

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