3.5+0.4= 6.8-2.4= 0.8+0.12= 0.27+0.33=
0.75×100= 50×60= 900÷4÷25= 6.74×10=
0×99÷33= 12.1÷100=
13.4+5.97+6.6
35.26-7.8-15.26
35+75=
32+44+68=
24×50=
46×8÷46×8=
97-97×0=
6000÷8÷125=
137-56-37=
25×3×8=
23×99+23=
235-(35+27)=
420÷30=
92÷100=
0.32×1000=
45.5-45=
8÷8×8÷8=
0.42+9.5=
4.5×4= 12.5×0.8= 35×0.6= 21÷1000=
3.67+1.08= 6.7-2.57= 3-1.08= 37×100÷10=
420-99= 15×30= 0.01×1000= 25÷5×8=
8÷1000= 3.14×10= 5.17÷100= 35+24-12=
①0.4x=3.6
②x﹣x=70
③1.6:x=0.8:0.4
④=