如题所述
本题可以用凑整法进行简便计算，把99.9看做100减去0.1。
6.93×99.9
=6.93×(100-0.1)
=6.93×100-6.93×0.1
=693-0.693
=692.307
6.93×99.9
=6.93×(100-0.1)
=6.93×100-6.93×0.1
=693-0.693
=692.307
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第1个回答 2020-09-11
简便计算
6.93×99.9
=6.93x（100-0.1）
=6.93x100-6.93x0.1
=693-0.693
=692.307
6.93×99.9
=6.93x（100-0.1）
=6.93x100-6.93x0.1
=693-0.693
=692.307
第2个回答 2020-09-11
6.93×99.9
=6.93×(100－0.1)
=6.93×100－6.93×0.1
=693－0.693
=692.307
=6.93×(100－0.1)
=6.93×100－6.93×0.1
=693－0.693
=692.307
第3个回答 2020-09-11
6.93*（100-0.1）=6.93*100-6.93*0.1=693-0.693=692.307
