①0.25×4= ②0.24÷12= ③6.8÷4= ④0.8×12.5= ⑤13.8×0=
⑥10×99.5= ⑦2.4×5= ⑧0.81÷0.09= ⑨2.74+0.726÷0.1= ⑩0.42÷0.7÷0.6=

小时,学生自主探究用去
,教师讲解用去
,剩下的时间学生练习,练习时间占这节课的几分之几?
9.6×10.1=
小明课外书的本数比小刚的2倍还多18本.如果小刚有课外书x本,小明有本.
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