简便计算0.8ⅹ5.98=0.8x（6-0.02）=0.8x6-0.8x0.02=4.8-0.016=4.784
0.8×5.98=0.8×（6-0.02）=4.8-0.16=4.64，答案是4.64。
0.8X5.98=0.8X(6-0.02)=0.8X6-0.8X0.02=4.8-0.016=4.784
