Question

17．在橫線里填上“＞”、“＜”或“=”．
7.009＜7.9                                
8×0.85＜  8×8.5
3.475×1.01＞3.475                      
9.89＞ 0.9×9.89．

Answer 1

分析 一個(gè)數(shù)（0除外）乘小于1的數(shù)，積小于這個(gè)數(shù)；一個(gè)數(shù)（0除外）乘大于1的數(shù)，積大于這個(gè)數(shù)；據(jù)此解答．

解答 解：7.009＜7.9                                
8×0.85＜8×8.5
3.475×1.01＞3.475                      
9.89＞0.9×9.89
故答案為：＜，＜，＞，＞．

點(diǎn)評(píng) 此題考查了不用計(jì)算判斷因數(shù)與積之間大小關(guān)系的方法．