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406÷7计算并验算

406÷7计算并验算要是406或是7 计算:406/7=58 验算:58*7=406 或406*58=7

计算:406×7=2842 验算:2842÷7=406 或2842÷406=7

424÷7=60…4218÷2=109780÷6=130230÷7=32…6959÷9=106…5600÷4=150406÷2=203※514÷3=171…1※325÷2=162…1

①② ③ ④ ⑤ ⑥

38÷2=19; 440÷9=48…8; 756÷7=108; 138÷3=46; 323÷4=80…3; 840÷3=280; 435÷7=62…1; 验算: 406÷2=203 验算: 504÷3=168; 验算:

406÷62=6......34 验算:62×6+34=406

①39+86=125验算:②406+398=804验算:③610-456=154验算:④900-358=542验算:

(1)280×16=4480; 验算:4480÷280=16(2)36×242=8712; 验算:8712÷242=36(3)420×50=21000; 验算:21000÷420=50(4)48×320=15360; 验算:15360÷320=48(5)57×198=11286; 验算:11286÷198=57(6)406×80=32480. 验算:32480÷406=80

145×27=3915;918÷51=18;406×30=12180;200÷25=8;340×27=9180;验算:2100÷35=60.验算:

1.35x-x=406 x=406/(1.35-1) =406/0.35 =1160

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