巧算24.2,2,6,7( )2,4,10,10( )4,4,10,10( )
计算:1*4+2*7+3*10+4*13+.+9*28+10*31(巧算)谢谢!
在方框里加上“+”或“—”,使句子成立.2/10( )3/10( )4/10( )5/10( )6/10( )7/10(
找规律:1,15,2,10,4,6,7,( ),()
24点:(1 ):2,2,7,10 (2):1,4,4,6
巧算(*表示乘号)1*2*3+2*3*4+3*4*5+…+10*11*12 巧算3-6+9-12+…1995-1998+
找规律1,2,4,6,7,10,10,(),().
找规律:1,2,4,6,7,10,10,14,(),()
找规律,填一填 ⑴1,4,7,10,( ),( ).⑵2,6,10,54,16
找规律1,2,4,6,7,10,10,14( ),( )
找规律:1,2,4,6,7,10,10,( ),( )
找规律10,1,8,2,6,4,4,7,2,( ),( )
找规律.1,2,4,6,7,10,10,( )().1,2,3,5,8,13()()