98 = 100 - 2,38 x 100 = 3800 - 38 - 38 = 3800 - 76 = 3724 请采纳谢谢
等于4.5x(1-0.02)=4.5-0.09=4.41
432-98=432-100+2=332+2=334 你好,本题已解答,如果满意,请点右上角“采纳答案”,支持一下.
98*38+38=98*38+1*38=(98+1)*38=(100-1)*38=3800-38=3762.
=(98+1)*38=99*38=(100-1)*38=100*38-1*38=3800-38=3762
38*98+98+98=98*(38+1+1)=98*40=100*40-2*40=4000-80=3920
3.8*98=3.8x(100-2)=3.8x100-3.8x2=380-7.6=372.4
展开全部4.35*98=4.35*(100-2)=4.35*100-4.35*2=435-8.7=426.3
37*98=3626
37*98=37*(100-2)=37*100-37*2=3700-74=3626