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Serhud [2]
4 years ago
14

Explain 81-16 in mental math

Mathematics
2 answers:
Tems11 [23]4 years ago
3 0

Answer:

we have  

(81-16)  

One way to use mental math is to add  4  to both  81  and  16  

so

81+4=85\\ 16+4=20\\ 85-20=65  

therefore

81-16=65  

the answer is

65

Step-by-step explanation:


Dovator [93]4 years ago
3 0

Answer:

65 See below

Step-by-step explanation:

when doing mental math you need to break it apart to more manageable chunks.  

I would think of this as  70 and  11 - 6 = 75 then subtract 10 = 65

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5 0
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What does B(0) = 0 mean
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Answer:

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