2021+100=
102﹣18=
25×24=
+=
0.26-0.22=
2.74﹣1.4=
3.6÷2=
×=
6.4÷80%=
15×=
①34+12x=92
② =x:
③3.5:4.2=6:x
2x+×10=30 :x=:
2.3×6= 6.5÷0.01= 0.36÷0.4= +=
0.82= 1.2×= -= 4.3÷2.5÷4=
7.15﹣1.5= +0.25=