Question

小学四年级数学题简便方法（1）25X166X4（2）99X56+56（3）（80-8）X125（4）270*6*5

Answer 1

（1）25x166x4
=25x4x166
=100x166
=16600
(2) 99x56+56
=(99+1)x56
=100x56
=5600
(3) （80-8）X125
=80x125-8x125
=10000-1000
=9000
(4) 270x6x5
=270x(6x5)
=270x30
=8100
正确的 谢谢

Answer 2

﹙1﹚25×166×4＝25×4×166＝100×166＝16600
﹙2﹚56×99+56×1＝56×﹙99+1﹚＝56×100＝5600
﹙3﹚﹙80－8﹚×125=80×125－8×125＝10000－1000＝9000
﹙4﹚270×6×5=270×30=8100

Answer 3

(1). 25×166×4=25×4×166=100×166=16600 （2）.99×56+56=99×56+56×1=56×（99+1）=56×100=5600 （3). (80-8）×125=80×125-8×125=10000-1000=9000

Answer 4

25X166X4 99X56+56 （80-8）X125 270X6X5
=25X4X166 =56X(99+1) =80X125-8X125 =270X(6X5)
=100X166 =56X100 =10000-1000 =270X30
=16600 =5600 =9000 =8100

Answer 5

（1）25X166X4
=25X4X166
=100X166
=16600