m×2.5×4=×(×)
5a+ ax=(+)×
4a+6a= 15x-9x=
3.2b-1.6b= m+4m+8m=
10a+8a-5a= x-0.25x=
2x-y+6x= 10m-n-m-5n=
3.7×a= x×x= m×n×4=
15.8y÷2= n+c×9= 7.3a+2.7a=
a×12=
b×b=
a×b=
x×y×7=
5×x=
2×c×c=
7x×5=
2×a×b=
a·a=
6×m×7n=
8a×9b×10c=
a×a×a=
7.2+(m+2.7)=(+)+m
4×(125+m)=×+×
16×x+y×=(+)×16
a-b-c=-(+)
n×=3.5×
x×15= 6×m=
a×b= 6.5-2.3×y=