文档介绍:27+8=
67-25=
27-15=
27+30=
50+12=
40+15=
75+10=
47+37=
70-15=
37-17=
28-18=
72+18=
17+18=
72-27=
53-43=
727+8=
67-25=
27-15=
27+30=
50+12=
40+15=
75+10=
47+37=
70-15=
37-17=
28-18=
72+18=
17+18=
72-27=
53-43=
73-72=
81-21=
80+13=
74-16=
72-60=
77-22=
65-50=
83-54=
72+27=
70+11=
75+16=
80-13=
82-24=
12+13+54=
28-27+59=
33+(56-31)=
41-39+45=
40+41-24=
26+27-53=
34-(13+9)=
6×9-27=
70+72-15=
86-(34+25)=
9×3+65=
4×8+58=
26-17+39=
8×9-43=
6×(45-38)=
63-45+34=
59-16+23=
5×7-35=
78-(54-24)=
60+30-45=
9×4-35=
5×8+60=
24+25-15=
7×8+44=
47-35+45=
4×7+24=
68-56+56=
98-12-23=
5×6+30=
3×6+35=
5×5-13=
7×7-49=
18+19-30=
36+8+49=
4×7+22=
32+58+10=
2×3+45=
24-15-5=
4×4+4=
76-9-47=
24-24+12=
7×6-40=
94+3=
20+7=
50-4=
16+8=
41+25=
52-34=
55-24=
28+22=
51-12=
42- 8=
81-7=
35+16=
28+15=
40-16=
7×6-40=
45-40+25=
4×6+13=
82-65-12=
27+30-20=
20+50-23=
4×5-12=
3×7+45=
7×5-30=
5×6+30=
3×6+35=
5×5-13=
7×7-49=
18+19-30=
12÷ 2 =
24÷ 6 =
9 ÷ 3 =
16÷ 4 =
12÷ 6 =
6 ÷ 6 =
5 × 5 =
5 × 4 =
8 × 2 =
9 × 3 =
7 × 4 =
90-45=
83-40=
78-9=
15- 6=
85- 47