七点四三减括号三点四八点二点五期括起来用简便方法计算算式
七点四三减括号三点四八点二点五期括起来用简便方法计算算式
7.43-(3.48-2.57)=7.43-3.48+2.57=(7.43+2.57)-3.48=10-3.48=6.52
五十四除以括号一点七加上二点一加上三点四括号用简便方法计算
54÷(1.7+2.1+3.4)
=54÷7.2
=(18×3)÷(18×0.4)
=3÷0.4
=7.5
七点四乘八点八加七点四乘二点二减七点四的简便方法怎么
7.4*8.8+7.4*2.2-7.4
=7.4*(8.8+2.2-1)
=7.4*10
=74
4 0点四的和乘二点五用简便方法计算
4 0点四的和乘二点五用简便方法计算
4 0点四的和乘二点五
=4*2.5+0.4*2.5
=10+1
=11
用简便方法计算76.8-52点四三-21点七
用简便方法计算76.8-52点四三-21点七
76.8-52.43-21.7
=24.37-21.7
=2.67
直接计算
六点三乘以七点四加七点二乘七点四减三点五乘七点四这个算式怎么简算
原式=(6.3+7.2-3.5)x7.4
=(13.5-3.5)x7.4
=10x7.4
=74
三点四乘以二点六加七点四乘以十七乘以二用简便方法怎样算
3.4*2.6+7.4*17*2
=34*(0.26+7.4)
=34*7.66
=34*7+34*0.6+34*0.06
=238+20.4+2.04
=260.44
七点7×5分之1+0点四三×2十二用简便方法计算
答:7.7*1/5+0.43*22
=7.7*0.2+0.86*11
=77*0.02+0.86*11
=11*0.14+0.86*11
=11*(0.14+0.86)
=11*1
=11
52点零二除以括号七点5×3-17点四括号 简便方法
52.02÷(7.5x3-17.4)
解:
=52.02÷(22.5-17.4)
=52.02÷5.1
=(52.02x10)÷(5.1x10)
=520.2÷51
=(3x173.4)÷(17x3)
=173.4÷17
=10.2x17÷17
=10.2
祝学习进步。