①56﹣49+38
②27÷3×4
③12+18÷6
④54﹣7×3
⑤7×(24﹣18)
⑥(39+25)÷8
530-30=
2000+800=
72÷9=
40+70=
380-80+200=
600+400=
6×7=
30+700=
1500-900=
18-8÷2=
①860-(427-279)
②642-486+365
③422+333-195
×8<55 6×<23 ×4<32
5×<29 ×9<54 3×<22