1. ++=21                       +++=32

+=                            ×=

{#blank#}1{#/blank#}×8＜60       5×{#blank#}2{#/blank#}＜24              54＞{#blank#}3{#/blank#}×9

{#blank#}4{#/blank#}×4＜30      6×{#blank#}5{#/blank#}＜43            60＞{#blank#}6{#/blank#}×7

8千克，{#blank#}1{#/blank#}千克，{#blank#}2{#/blank#}千克。

 {#blank#}1{#/blank#}×5<42      {#blank#}2{#/blank#}×8<27     {#blank#}3{#/blank#}×7<54