①17.8×31.2÷5.2
②1.6-1.2+37.8
③47.9--
④68×99
=
10﹣10%=
8×12.5%=
0.3×0.4=
2.95+0.5=
2÷0.25=
910÷70=
4.6+6.4=
1+2%=
×=
120÷50%=
×7.2=
×0÷3=
×98=
1+75%=
÷2=
0.2×50=
70%-20%=
4÷8×=
÷25%=
10×10%=
63÷90%=
5×÷5×=
①6.28-(1.28+0.25)
②×99+13÷50
③(1.64+1.64+1.64+1.64)×25
④
5.63-4.47 +2.37 -0.53
0.125×32×2.5
15÷[12×()]