add
subtract
add
subtract
add
100
100+200
What is 300
100
200-100
What is 100
100
100+100
What is 200
100
100-100
What is 0
100
300+500
What is 800
200
150+150
What is 300
200
350-25
What is 325
200
350+350
What is 700
200
150-150
What is 0
200
150+250
What is 400
300
125+125
What is 250
300
500-50
What is 450
300
325+325
What is 650
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