三四十二

{#blank#}1{#/blank#}×3，{#blank#}2{#/blank#}×4

一四{#blank#}1{#/blank#}

8{#blank#}1{#/blank#}6=2       4{#blank#}2{#/blank#}8=32      36{#blank#}3{#/blank#}4=40

45{#blank#}4{#/blank#}9=5     12{#blank#}5{#/blank#}8=4       5{#blank#}6{#/blank#}6=30

4×3=      66－45=      70－5=      23－（46－38）=

36+7=      25+65=      23+37=      21+19+34=

5×6=      90－45=      2×2=      6×6-28=

42-8=      6×4=      4×4=      40+（89-54）=

25+21=      5×3=      6×3=      70+2×6=