6.46.400 1.231.32 109克1.09千克 583÷1000.583×10
4.78<4.{#blank#}1{#/blank#}9 6.2{#blank#}2{#/blank#}<6.21
1.245<1.24{#blank#}3{#/blank#} 0.9{#blank#}4{#/blank#}=0.900