=
43=
72=
x÷0.2=7.2 △2x-3.42=6.4
138-x=57 4x+6x=18
7m+0.7m=
3.14×0.22=
+0.25=
1-=
25×0.07×4=
3.14×12=
-0.3=
+5= 8× = - = × =
×8= 2- = 100× = + =
×=
口诀:
9.09﹣0.9= 0.8×0.32= 50÷10%= 0.125×32× =
7÷14%= = = 2.5+2.5÷5=