1/4*48*2/5=?14*2/21+1/2=?24*(3/2-4-5/4) 75*11/76=?能用简便运算就用简便运算
问题描述:
1/4*48*2/5=?14*2/21+1/2=?24*(3/2-4-5/4) 75*11/76=?能用简便运算就用简便运算
答
1/4*48*2/5
=12*2/5
=4.8
14*2/21+1/2
=4/3+1/2
=11/6
24*(3/2-4-5/4)
=24*3/2-24/4-24*5/4
=36-96-30
=-60-30
=-90
75*11/76
=(76-1)*11/76
=76*11/76-11/76
=11-11/76
=10又65/76