Question

Tính nhanh:
97+998+9999+16

Answer 1

\(97+998+9999+16=\left(97+3\right)+\left(998+2\right)+\left(9999+1\right)+10=10+100+1000+10000=11110\)

Answer 2

97 + 998 + 9999 + 16 = ( 97 + 3 ) + ( 998 + 2 ) + ( 9999 + 1 ) + 10 = 10 + 100 + 1000 + 10000 = 11110