相关试题
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= 1+
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﹣0.2= 
+0.3=
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= 1﹣
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= 2x+x=240﹣40÷4= 125×（8+8）= ÷12=6 2000×3+60=
320×11÷32= 1﹣
= 24×5﹣25×4= 8×13×25=
4005÷19≈
口算．
300×7= 40+300= 58÷7= 40×8=
720﹣90= 3200﹣3000= 0×800= 45÷9=
5×60= 4+6×4= 604×3≈ 695×9≈
705+196≈ 397×4≈ 78×5≈ 
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1﹣
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= 80﹣20×0=
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= 1﹣
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