35+6= 100-40= 72+20= 65-30= 78-8=
6÷1= 15÷3= 4×4= 3÷3= 3×6=
2×3= 30÷5= 5×1= 10÷2= 12÷4=
①4:5=x:25
②1+4x=6.7
③3x﹣60%x=4.32
④:3
①
②36×()
③
④
⑤3.24×0.76+3.24×0.24
⑥
+ = 50÷50%= = 3 -1.125=
1.9÷2.5÷0.4= ( )×18= = 1- =