5.8 乘以99加5.8简便运算怎么算?
来源:学生作业帮助网 编辑:作业帮 时间:2024/09/25 03:25:16
99×22+33×34=33×66+33×34=33×(66+34)=33×100=3300
9.25乘以9.9加百分之92.5=9.25*9.9+9.25*0.1=9.25*(9.9+0.1)=9.25*10=92.5
84*34+84*19+53*16=84*(34+19)+53*16=84*53+53*16=(84+16)*53=100*53=5300希望能够帮到你
33*(2*0.88+0.24)=33*[2*(1-0.12)+0.24]=33*2
222*88+888*78=222*4*22+888*78=888*22+888*78=888*(22+78)=888*100=88800
57*98%+0.57*2=57*98%+57*2%=57
99*9+98=99*9+99-1=99*(9+1)-1=990-1=989
905×99+905=905×(99+1)=905×100=905001000×99-99+199=99000+(199-99)=99000+100=99100
0.3333乘以23加0.1111乘以31的简便运算=0.1111x3x23+0.1111x31=0.1111x(69+31)=0.1111x100=11.11
302×99+138=302×(100-1)+138=302×100-302+138=30200-(302-138)=30200-164=30000+(200-164)=30000+36=30036
99×83+83=83×(99+1)=83×100=8300
(100-1)乘以56=5600-56=5544
56x(99+1)=56x100=5600
65*15+15*32=15*(65+32)=15*97=15*(100-3)=1500-45=1455
172.4×6.2+1724×0.38=172.4×6.2+172.4×3.8=172.4×(6.2+3.8)=172.4×10=1724
O(∩_∩)O再答:=48*26+26*52=26*(48+52)=26*100=2600
稍等再答:
21.5乘以1.9加2.15乘以81=21.5×1.9+2.15×81=2.15×(19+81)=2.15×100=215;