如题所述
第1个回答 2022-10-12
76.6×98
=76.6x(100-2)
=76.6x100-76.6x2
=7660-(75+1+0.6)x2
=7660-150-2-1.2
=7506.8
=76.6x(100-2)
=76.6x100-76.6x2
=7660-(75+1+0.6)x2
=7660-150-2-1.2
=7506.8
第2个回答 2022-10-12
把98改成100-2
原式=76.6*(100-2)=76.6*100-76.6*2=7669-153.2=7515.8
原式=76.6*(100-2)=76.6*100-76.6*2=7669-153.2=7515.8