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Mental Math
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114-102+207+210-107+507
829
Oops!
Okay!
821+176-786+773-561-422+127
128
Oops!
Okay!
947-946+166+722-859+461+501
992
Oops!
Okay!
180+202+602-784+298-485
13
Oops!
Okay!
509+420-909+725-605+550
690
Oops!
Okay!
638+210-838+130+352-172
320
Oops!
Okay!
976-655+652-850+556
679
Oops!
Okay!
331+107-308+763-570-113+568
778
Oops!
Okay!
211+177-286+700-800
2
Oops!
Okay!
740+157-587+567-856+516+312
849
Oops!
Okay!
473-370+751-551+180-171+131-113
335
Oops!
Okay!
155+644-787+580+300-892+237
237
Oops!
Okay!
453-450+135+700-525+575+110
998
Oops!
Okay!
751+236-876+121+605-717
120
Oops!
Okay!
784-684+564-662+440
442
Oops!
Okay!
804-601+671-851+951
974
Oops!
Okay!
688+210-678+108+120-225-220
3
Oops!
Okay!
560+115-575+706+170-776
200
Oops!
Okay!
636+102-627+866-767+611+101
922
Oops!
Okay!
795-675+274-162+612
844
Oops!
Okay!
196-176+404-402+361+600-771
217
Oops!
Okay!
499-469+759-768+770
791
Oops!
Okay!
409+580-765-203+713-514
220
Oops!
Okay!
831-811+124+355-398
101
Oops!
Okay!
869-758+723-733+886
987
Oops!
Okay!
811+106-706+130-120
221
Oops!
Okay!
647-535+122-104-110
20
Oops!
Okay!
222+112+515-737-101+688-164
535
Oops!
Okay!
825-605+271-371+151
271
Oops!
Okay!
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