403乘以3约等于多少 15/4×196减3/40乘以196用简便方法计算

15/4×196减3/40乘以196用简便方法计算  

15/4×196减3/40乘以196用简便方法计算

15/4×196-3/40x196
=(15/4-3/40)x196
=147/40x196
=720.3

15/4×19.6减3/4×196如何简便方法

15/4×196减3/4×196如何简便方法
15/4×196减3/4×196
=3又3/4*196-3/4*196
=3*196
=588

196乘以19加196用简便方法怎么计算?

196×19+196
=196×(19+1)
=196×20
=(200-4)×20
=200×20-4×20
=4000-800
=3200

196乘34减196乘348用简便方法计算

196乘34减196乘348用简便方法计算
196乘34减196乘348
=196*（34-348）
=-196*314
是不是算式抄错了
不会是负数的

4/15乘以14用简便方法计算

4/15×14
=4/15×(15-1)
=4/15×15-4/15×1
=4-4/15
=3又11/15

用简便方法计算下面两题 47/99乘以97 简便方法计算 1/5乘以27加3/5乘于41

(1)
=47/99×99-47/99×2
=47-94/99
=46又99分之5
(2)
=1/5×27+1/5×(3×41)
=1/5×(27+123)
=1/5×150
=30

121乘以3/4减去3/8乘以40减去0.75的简便算法

121*(3/4)-(3/8)*40-0.75
= 121*(3/4)-(3/4)*20-3/4
=(121-20-1)*(3/4)
=100*(3/4)
=75

怎样用简便方法计算(99 乘以3/4)的平方

（99又3/4）²
=（100-1/4）²
=100²-2×100×1/4+1/4²
=10000-50+1/16
=9950又1/16

1/3除以3/7乘以5/14用简便方法计算

1/3除以3/7乘以5/14
=1/3×7/3×5/14
=7/9×5/14
=5/18