2.1÷0.28=÷28 36.4÷0.004= ÷4
2.1÷2.8 = ÷28 36.4÷0.04=÷4
21 ÷2.8 = ÷28 36.4÷0.4=÷4
21÷0.28 =÷28 3.64÷0.4=÷4
844÷4= 84÷3= 225÷5=
84.4÷4= 8.4÷3= 22.5÷5 =
8.44÷4= 0.84÷3= 2.25÷5=
①3.14÷1.25÷0.8
②14.5-4.5×3.2
③1.96×3.7+6.3×1.96
④72÷(3.56+1.24)
⑤1.6×0.25×2.5
⑥0.36÷[(3.1-3.09)×0.4]
每盒10颗,每颗0.15g。
每天服用量为0.9g。