Question

3.75 乘以4.23乘以3.6减12.5乘以0.423乘以2.8怎么算

Answer 1

3.75 乘以4.23乘以3.6减12.5乘以0.423乘以2.8怎么算

3.75 ×4.23×3.6-12.5×0.423×2.8
=1.25 ×4.23×10.8-1.25×4.23×2.8
=1.25 ×4.23×（10.8-2.8）
=1.25×4.23×8
=（1.25×8）×4.23
=10×4.23
=42.3

12.5乘以4乘以2.5乘以16

12.5*4*2.5*16
=12.5*8*2.5*4*2
=100*10*2
=2000

3.6乘以21.6减去0.8乘以2乘以3.6的简便方法

解: 3.6*21.6-0.8*2*3.6

=3.6 * (21.6-0.8*2 )

=3.6 * (21.6-1.6)

=3.6 * 20

=72

2006乘以12.5减1.25乘以20减12.5乘以4的简便方法怎样做

2006x12.5-1.25x20-12.5x4=12.5x(2006-2-4)=12.5x2000=25000

209乘以215乘以209减430乘以109怎么速算

你敢用算式写么！这样看不懂啊啊啊啊啊

2.5乘以3.2乘以12.5

2.5*3.2*12.5
=2.5*4*0.8*12.5
=10*10
=100

0.5乘以12.5乘以2.5乘以128（要简便）

=0.5×2 ×12.5×8 ×2.5×4 ×2
=(0.5×2) ×(12.5×8) ×(2.5×4) ×2
=1×100×10×2
=2000

请问3.75乘以7.5加6.28乘以7.5怎么算

3.75×7.5+6.28×7.5
=7.5×（3.75+6.28)
=7.5×10.03
=7.5×10+7.5×0.03
=75+0.225
=75.225

【2009乘以2008减2008乘以2008】乘以0.01乘以0.01

【2009乘以2008减2008乘以2008】乘以0.01乘以0.01
=【2008×（2009-2008）】×0.0001
=2008×0.0001
=0.2008

2.8乘以0.65+2.8乘以0.35

2.8呀~