22.5÷[6.32-([]-2.25)]=9
22.5÷[6.32-([]-2.25)]=9
如果是小学,可以用还原演算法。
22.5/9=2.5=6.32-([ ])-2.25
([ ])-2.25=6.32-2.5=3.82
[ ]=2.25+3.82=6.07
如果是中学,可以直接用方程解。
设[ ]=X
22.5/[6.32-([ ])-2.25]=9
整理,得X=6.07
22.5/[6.32-[]-2.25]=9
1.57
22.5÷[6.32-(?-3.25]=9列式
22.5÷[6.32-(?-3.25]=9
[6.32-(?-3.25]=22.5/9
(?-3.25)=6.32-22.5/9
?=6.32-22.5/9+3.25
?=6.32-2.5+3.25
?=7.07
22.5÷[6.32-﹙□-2.25﹚]=9的方框里的数字是﹙﹚。﹙还要算式﹚
(6.32-22.5*9)+2.25=6.07
22.5÷[6.32-(?-3.25]=9这道题怎么做?
22.5÷[6.32-(?-3.25)]=9
6.32-(?-3.25)=2.5
?-3.25=3.82
?=7.07
简算10.3*2.25 397*0.225_22.5
原式
=10.3x2.25+397x0.225-22.5
=10.3x2.25+39.7x2.25-2.25x10
=(10.3+39.7-10)x2.25
=(50-10)x2.25
=40x2.25
=40x2+40x0.25
=80+10
=90
2.25×1.8 22.5×0.32怎么简算
2.25×1.8+22.5×0.32
=2.25×1.8+2.25×3.2
=2.25×(1.8+3.2)
=2.25×5
=11.25
63.2*0.1+6.32*9
63.2*0.1+6.32*9
=63.2*0.1+63.2*0.9
=63.2*(0.1+0.9)
=63.2*1
=63.2
1.2x2.25 8x22.5怎样简便
4X8X1.25X25% =4×0.25×8×1.25 =1×10 =10 (69分之1+71分之2)X23+71分之25 =1/69×23+2/71×23+25/71 =1/3+(46/71+25/71) =1又1/3 36% =9/25 50%=1/2 160% 8/5 7.5%=3/406÷(8)=16分之12=(9):12=0.75=(75)% 祝你学习进步! 不理解请追问,...
3.687/9+6.322/9
解:依题意得算式,
3.68-9分之7+6.32-9分之2
=3.68+6.32-(9分之7+9分之2)
=10-1
=9
即3.68-9分之7+6.32-9分之2=9