439x2 ( Use only algorithm. )
2 answers:
Answer:
878
Step-by-step explanation:
439 x 2
2x9= 18
2x30=60
2x400=800
Then add
800+60+18
60+18=78
800+78= 878
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Answer: The 3rd answer on the graph
Step-by-step explanation:
Answer:
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