6.4×0.999{#blank#}1{#/blank#}6.4

①4.35×1.02{#blank#}1{#/blank#}4.35               3.98÷1.2{#blank#}2{#/blank#}3.98           0.98×0.98{#blank#}3{#/blank#}0.98

②40.5÷0.8{#blank#}4{#/blank#}40.5                8.24×1{#blank#}5{#/blank#}8.24             3.9÷0.99{#blank#}6{#/blank#}3.9

99×0.99{#blank#}1{#/blank#}99      0.98×9.8{#blank#}2{#/blank#}9.8     460千克{#blank#}3{#/blank#}0.46吨

3.6×0.23{#blank#}4{#/blank#}0.23    4.9{#blank#}5{#/blank#}4.9×1.1      5.2米{#blank#}6{#/blank#}522厘米