Question

78 -1=?and 90-4=?.please help me i can't solve this ques

Answer 1

Answer:

❤. 78 - 1 = 77

❤. 90 - 4 = 86

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Answer 2

Answer:  [a] 77    

                [b]86

Step-by-step explanation:

78-1=77

90-4=86