用时分 答对题
$321÷ 3× 6$
$72× 4÷ 8$
$73+102÷ 6$
$(700-140)÷ 7$
$684÷ (3× 2)$
$240× 8-135$
$256+412÷ 4$
$723÷ 3× 5$
$(84-39)÷ 9$
$800-57× 9$
$(1734-958)÷ 8$
$792÷ 9× 7$
$960÷ 5÷ 3$
$78× 3÷ 9$
$1089-(400+311)$

1.642
2.36
3.90
4.80
5.114
6.1785
7.359
8.1205
9.5
10.287
11.97
12.616
13.64
14.26
15.378