Question

六年级简便计算

需六年级简便运算数学题（可分数）不少于20道
好的再加30分
7号之前

Answer 1

(1)999*2-999
=999*(2-1)
=999
(2)32*25
=4*8*25
=100*8=800
(3)15*999+15
15*(999+1)
=15000
(4)15+16+75+84
=(15+75)+(16+84)
=200
(5)825*2-825
=825*(2-1)
=825
(6)48*25
=4*12*25
=100*12=1200
(7)145*999+145
145*(999+1)
=145000
(8)45+65+55+35
=(45+55)+(65+35)
=200
(9)96*2-96
=96*(2-1)
=96
(10)24*25
=4*6*25
=100*6=600
每个仿照1个就行拉.

Answer 2

(1)999*2-999
=999*(2-1)
=999
(2)32*25
=4*8*25
=100*8=800
(3)15*999+15
15*(999+1)
=15000
(4)15+16+75+84
=(15+75)+(16+84)
=200
(5)825*2-825
=825*(2-1)
=825
(6)48*25
=4*12*25
=100*12=1200
(7)145*999+145
145*(999+1)
=145000
(8)45+65+55+35
=(45+55)+(65+35)
=200
(9)96*2-96
=96*(2-1)
=96
(10)24*25
=4*6*25
=100*6=600

Answer 3

Answer 4

晕,我看都不想看了

Answer 5

晕哟！！！