198乘以0.51用简便计算怎样做

来源：学生作业帮编辑：大师作文网作业帮分类：数学作业时间：2024/11/11 05:26:35

198乘以0.51用简便计算怎样做
还有40.7-2.6乘以9.3、5.2乘以10.1
还有3.2乘以1.8+2.54、0.8乘以72.4乘以12.5、2.5乘以3.7+6.3乘以2.5

198 * 0.51 =200 * 0.51-2 * 0.51 =102-1.02 =100.98
40.7-2.6 *9.3
=40.7 -2.6*（10 -0.7）
=40.7 -26 +2.6*0.7
= 14.7 +2.6*0.7
=14.7 +2.6*（1 -0.3）
=14.7 +2.6 -0.78
=17.3-0.78
=16.52
5.2*10.1=5.2*（10 +0.1）=52 +0.52=52.52

198乘以0.51用简便计算怎样做 35乘以4乘以35用简便方法怎样计算 7.6乘以7.3加上1.9乘以4乘以7.3用简便方法计算怎么做? 4.83乘以0.59加0.41乘以1.59减0.324乘以5.9用简便方法怎样计算 7.45乘以0.99用简便方法计算怎么做 125乘以39加125用简便方法怎样计算 2.96乘以40用简便方法怎样计算 1.25乘以0.88用简便方法怎样计算 13/88乘以87怎样简便计算怎样简便计算45乘以14 3.9乘以0.54怎样简便计算 0.049乘以0.32怎样简便计算