=3- 1/3- 1/9
=3-(3/9+ 1/9)
=23/9
2、 15/ 16+(7/ 16- 1/4)÷ 1/2
= 15/ 16+3/ 16÷ 1/2
= 15/ 16+6/ 16
=2 1/ 16
3、 1/5÷[(2/3+ 1/5)* 1/ 13]
= 1/5÷[ 13/ 15* 1/ 13]
= 1/5÷ 1/ 15
=3
It's not easy to learn math well, and it's a good way to copy math newspapers by hand. The following are the pictures and materials I b