Question

6.25/7.5+7.5/3.74怎样简便

Answer 1

6.25/7.5+7.5/3.74怎样简便

简便计算
6.25×7.5+7.5×3.74
=（6.25+3.74）×7.5
=9.99×7.5
=10×7.5-0.01×7.5
=75-0.075
=74.925

6.25/(6.25*4)简便演算法

1/4，直接把6.25约掉了，就剩下1/4

6.25/2.5*4的简便演算法

=6.25×4/2.5
=25/2.5
=10

7.5*6.8/6.8*7.5怎样简便计算

7.5*6.8/6.8*7.5
=7.5/7.5*6.8/6.8
=1*1
=1

4.67*1/4 +46.7%*7.5怎样简便

4.67*1/4 +46.7%*7.5
=4.67*0.25+4.67*0.75
=4.67*（0.25+0.75）
=4.67*1
=4.67

3.3/3.6 3.3/7.5-3.3/1.1怎样简便算

3.3/3.6 3.3/7.5-3.3/1.1这里缺少一个计算符号。
需要先约分在计算。可能是：
3.3/3.6 - 3.3/7.5 - 3.3/1.1
= 3.3(1/3.6 - 1/7.5 - 1/1.1)
=3.3[(7.5 * 1.1 - 3.6 * 1.1 - 3.6 * 7.5)] / 3.6 * 7.5 * 1.1
= -2.523
或
3.3/3.6 + 3.3/7.5 - 3.3/1.1
= 3.3(1/3.6 + 1/7.5 - 1/1.1)
=3.3[(7.5 * 1.1 + 3.6 * 1.1 - 3.6 * 7.5)] / 3.6 * 7.5 * 1.1
= -1.583

7.5*3.1/2.5用简便法怎样做

7.5*3.1/2.5
=7.5/2.5*3.1
=3*3.1
=9.3

5/7*7.5-5/7 5/7*3.5这样简便怎样算

5/7*7.5-5/7 5/7*3.5这样简便怎样算
5/7*7.5-5/7 5/7*3.5
=5/7*（7.5+3.5-1）
=5/7*10
=50/7

31.4-40.5/7.5 简便

31.4-40.5/7.5
=31.4-（0.5*81）/（0.5*15）
=31.4-81/15
=31.4-（3*27）/（3*5）
=31.4-5.4
=26

7.5/0.6 7.8/0.4简便

7.5/0.6+7.8/0.4
=12.5+19.5
=32