add

add

subract and multiply

multiply and add

subtract and add

common sence

100

15 + b = 28

What is b=13

100

44*1-c=42

What is c=2

100

2*2+K=10

What is K=6

100

28-4+Z=27

What is Z=3

100

2+2=a

What is a=4

200

2,000+4+900+50+c=4,354

What is c=1,400

200

163*11-S=1693

What is S=100

200

2*4+S=107

What is S=99

200

21+2-R=22

What is R=1

200

3*3=r

What is r=9

300

50,000+40,000+Y+20+600+100=90,722

What is Y=2

300

144*50-Q=1148

What is Q=52

300

9*9+G=86

What is G=5

300

22+23-d=40

What is d=5

300

9*9=w

What is w=81

400

100,000+20,000+3,000+951+N+82+7=124,040

What is N=0

400

2,000*252-L=502,000

What is L=2,00

400

5*5+T=85

What is T=60

400

40+22-f=22

What is f=40

400

8*9=t

What is t=72

500

124,040+A+40+24,040=170,320

What is A=22,2222

500

240*22-P=5140

What is P=140

500

96*2+U=230

What is U=38

500

49+78-w=107

What is w=20

500

12*12=u

What is u=144

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