综合算式:( )
18+12÷6 9×8-16 6+3×7
1400-900=
70÷8=
2300-1000=
25÷ (2+3)=
45÷9=
57+29=
700+800=
5×(48÷8)=
87-49=
23+9÷1=
44+4÷4=
4+9×7=
8×7+40 50-4×9 36+42÷6 64-16÷2
①56+3×7
②30-18÷6
③8×6-35
④45-9×4
⑤72÷8+24
⑥7×6-40