3.14×7=
25.12÷3.14 =
25×50%=
5.5÷50%=
×-÷ ÷[30%×(0.4+)] -8.25+40%-70%
5.2÷0.04= 1.32+0.8= 8 ÷8= 25+7.5=
51.51÷51= + ÷ = 1.5×2÷1.5×2= 149÷30≈