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22×35+33×7+99用递等式怎么简便运算

将原式的后两项组合,第一项22=20+2. 原式=(20+2)*35+33*7+33*3 =20*35+2*35+33*(7+3) =770+330 =1100

2014x(78+11x2)=201400 22x35+33x(7+3)=11x(35x2+3x10)=11x100=1100

22×35+33×7+99 =11×70+11×21+11×9 =11×(70+21+9) =71×100 =7100

原式 =(33+99)x67÷2 =132x67÷2 =66x67 =60x67+6x67 =4020+402 =4422 供参考。

(2.64+7.35)+(8.67+11.33) =9.99+20 =29.99

22×35+33×7+99 =11×(2×35+3×7+9) =11×(70+21+9) =11×100 =1100

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