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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

406×7 可以用简便=(400+6)×7 分配率=400×7+6×7 结果=2800+42 =2842

406除以4计算910除以7列式计算并验算 406÷4 =101.5 验算 101.5*4 =406 910÷7 =130 验算 130*7 =910 答

406÷62=6......34 验算:62×6+34=406

(1)707÷7=101;(2)646÷8=80…6;(3)406÷6=67…4;(4)45×60=2700;(5)8.3-3.4=4.9;(6)24×25=600.

408×90=36720406÷49=8…14163×46=7498验算:851÷23=37验算:

(1)603÷6=100…3; 100 6 603 6 3 (2)406×5=2030;406 ×5 2030 (3)83÷3=27…2; 27 3 83 6 23 21 2 验算:27 ×3 81 +2 83

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

405/25=16…… 5 验算 16*25+5=400+5=405

解:406-87-235 =419-235 =184 验算: 方法一: 184+235+87 =406 方法二: 406-184-87 =235

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