1200-28*14怎样简便运算
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/08 21:46:58
![1200-28*14怎样简便运算](/uploads/image/z/10132280-8-0.jpg?t=1200-28%2A14%E6%80%8E%E6%A0%B7%E7%AE%80%E4%BE%BF%E8%BF%90%E7%AE%97)
x)3420524ylb$W_`gC`1P( 104C, &p!i`a_\gu
n
2@h9P UBb=m\hP#0,4Ia'ab
.L@Vel$)fHlw 5
1200-28*14怎样简便运算
1200-28*14怎样简便运算
1200-28*14怎样简便运算
1200-28*14
=4*(300-7*14)
=4*2*(150-7*7)
=8*(150-49)
=8*101
=808
1200-28*14
=8*150-4*7*2*7
=8*150-4*2*7*7
=8*150-8*49
=8*(150-49)
=8*101
=808
=1200-(4*7)*(2*7)
=1200-4*2*7^2
=1200-8*49
=1200-8*(40+9)
=1200-8*40-8*9
=1200-320-72
=680-72
=608