①
−7 8
+3 5
−1 8
=____ ② 56÷2 5
× 107
=____5 7
③ (1112
−
)÷1 6
× 181
=____ ④ 14×1 3 1439
−1439
÷14 =____
⑤ 1
÷[321 9
−(32.4−2 5
×0.25)]×12 =____1 3
⑥ 20
−61 2
×1 4
2+12 5
÷42 3
=____
1 6 答案(点此获取答案解析)