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(6900-2400)÷5 75÷15+20×5 3090+6×6 = = = = = =
(387-387)+0 = =
(111+189)×3 = =
(1+7)×(16-6) = =
187+299-299 = = 153÷153+657 = = .
160-160÷80 = = 125×8÷100 = = 810×4÷4 = = 587+496-674 = = 32÷(32÷16) = = 750+550÷5 = = 6×250×0 = = 33÷11+4×9 = = 2660+26÷26 = =
300-(300-222) = =
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75÷15+20×5 (150-75)×(25-20)
= = = =
3390-10×95 687+(99-67)
= = = =
1000+(1000-988) 3560+20×90
= = = =
(250-150)÷(30÷6) 687+999÷3
= = = =
单纯的课本内容,并不能满足学生的需要,通过补充,达到内容的完善 教育之通病是教用脑的人不用手,不教用手的人用脑,所以一无所能。教育革命的对策是手脑联盟,结果是手与脑的力量都可以大到不可思议。
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