加法算式:
乘法算式:
2×3
( )×( )=( ) ( )×( )=( )
70-30=
83-30=
36+10=
27+30=
63+4=
34+30=
75-5=
64-40=
98-8=
29+8=
23+20=
18+50=
2×5= 1×4= 3×4= 2×3=
3×3= 2×4= 3×5= 4×5=
86-6= 30+45= 70-40= 39+8=
38-7= 43+8= 71-6= 58+6=
3×4= 6×4= 2×6= 4×5=
53+30-70= 41+9-20= 26+4-21=