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Subtraction
Addition
Time Elapsed
Time Telling
Find that number
100

55-24

31

100

281+24

305

100

1:17 to 2:17

60 min or 1hr 

100

half past 5

5:30

100

m= 6+10

m=16
200

75-23

52

200

130+74

204

200

6:30 to 7:45

1hr 15min

200

half past 11

11:30

200

6+m=10

m=4

300

335-125

210

300

165+420

585

300

4:15 to 6:45

2hrs 30min

300

Quarter to 11

10:45

300

33+m=66

m=33

400

812-564

248

400

614+157

771

400

5:20 to 7:50

2hrs 30min

400

Quarter past 12

12:15

400

147+m=306

m=159

500

924-437

487

500

157+265

422

500

3:16 to 5:26

2hr 10min

500

Quarter to 2

1:45

500

m+555=555

m=0