小学数学题,有分的

来源:百度知道 编辑:UC知道 时间:2024/05/21 12:18:58
简便计算
(1)11*11*11-11*11-10
(2)36*1111+8888*8

简便计算
(1)11*11*11-11*11-10
=11x11x(11-1)-10
=11x11x10-10
=10x(11x11-1)
=10x120
=1200

(2)36*1111+8888*8
=36x1111+1111x8x8
=1111x(36+8x8)
=1111x100
=111100

11*11*11-11*11-10
=11*11*10-10
=10x(11x11-1)
=1200
36*1111+8888*8
=1111×100
=111100

(1)11*11*11-11*11-10
=11x11x(11-1)-10
=11x11x10-10
=10x(11x11-1)
=10x120
=1200
或者
11*11*11-11*11-10
=11*121-121-10
=(11-1)*121-10
=10*121-10
=10*(121-1)
=1200

(2)36*1111+8888*8
=36x1111+1111x8x8
=1111x(36+8x8)
=1111x100
=111100

(1)11*11*11-11*11-10
=(11*11)*(11-1)-10
=10*(11*11)-10
=10*(11*11-1)
=10*(121-1)
=10*120
=1200
(2)36*1111+8888*8
=36*1111+1111*8*8
=36*1111+1111*64
=1111*(36+64)
=1111*100
=111100

(1)11*11*11-11*11-10
=11x11x(11-1)-10 <