Đáp án:
Giải thích các bước giải:
Tổng của 6 số là :
6 x 7 = 42
Nếu bỏ đi 1 số số thì tổng của 5 số còn là :
5 x 3 = 15
Số đã bỏ là :
42 - 15 = 27
Đáp số : 27
~ Chúc bạn hok tốt!~^^
tổng 6 số đó là 6.7=42
tổng 5 số sau khi bỏ 1 số là 5.3=15
vậy số đã bỏ là 42-15=27
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