①486÷680 ②318÷3318÷2 ③270÷9261÷9
④0÷70+7 ⑤400÷4500÷5 ⑥402÷2804÷4
150÷8 125÷8 0×320÷8 24×1524×16
7.8×250=
195÷0.78=