0.3÷= 5-= ×12= (4.2+)×2×0=
3.7+5= 300×0.3%= ×= 3×1+3×=
24x-1.6x=36
367+98= 0.4×0.2= 0.36÷0.4=
80×20%= 200×9%= 3.6×50%= 100×25%=
3.14×5= 5²×3.14= 2²×3.14= 3.14×9=
+= += ×20= 21×=
÷= ÷5= ÷12= ×=
0.25×40= 1-80%= 0.3×20%= 0.75÷ = 52-12=
3- = - = 0÷ = 0.21÷0.7= 1- + =
22.5+2.25= 6.4×25%= 9.3÷0.03= 1÷×= 1-1÷9=
50÷10%= 2.01-1.21= 1-÷= 1÷0.875= 0.32-0.22=