①12×7{#blank#}1{#/blank#}17×2                            ②16个月{#blank#}2{#/blank#}1年6个月

③45+15+3{#blank#}3{#/blank#}(45+15)+ 3            ④48÷4{#blank#}4{#/blank#}84÷4

⑤0.90元{#blank#}5{#/blank#}9角                              ⑥500-284-16{#blank#}6{#/blank#}500-(284+16)

49+{#blank#}1{#/blank#}＜90    100＞46×{#blank#}2{#/blank#}          {#blank#}3{#/blank#}×24＜95

15×{#blank#}4{#/blank#}＜95    23×{#blank#}5{#/blank#}＜75           532﹣{#blank#}6{#/blank#}＞223