3X27-7÷3等于多少图示计算
7÷3x27怎么巧算? -
解:原式=27÷3×7 =9×7 =63
图,
解:原式=27÷3×7 =9×7 =63
图,
您好:23/14x27-9/14除1/27 =23/14x27-9/14x27 =(23/14-9/14)x27 =1x27 =27 [2/3-4/9x3/8]除7/16 =(2/3-1/6)x16/7 =1/2x16/7 =8/7 不明白,可以追问如有帮助,记得采纳,谢谢祝学习进步!
=24+18-2 =40
简便运算23x27+23x73? -
23x27十23x73 =23x(27十73)=23x100 =2300
(9分之8+3分之2—27分之2)X27 =24+18-2 =40 15分之7÷8+8分之1X15分之8 =7/15*1/8+1/8*8/15 =7/15*1/8+1/15 =1/15*(7/8+1)1/15*15/8 =1/8 4分之3÷【56X(7分之3—8分之3)】3/4÷(24-21)3/4÷3 =1/4 5分之4÷【7分之5X(5分之2希望你能满意。
5²-3²=8X2,9²-7²=8X4,15²-3²=8X27, -
1、a²-b²=(a+b)(a-b)2、两个数的平方差=这两个数的和与大数减小数差得积3、这是平方差公式啊,
136x27十63x27一27 =27×(136+63+1)=27×200 =5400
简便:2/3+(1/2+2/3)X2/7、3-5/18X27/40-13/16 -
(1) =2/3+1/2x2/7+2/3x2/7 =2/3x(1+2/7)+1/7 =2/3x9/7+1/7 =6/7+1/7 =1 (2) =3-3/16-13/16 =3-(3/16+13/16)=3-1 =2
=1/9 14分之9x27分之22x11分之7 =9/14×22/27×7/11 =1/3 7分之2x2分之3x14 =2/7×3/2×14 =6 3分之1x4分之3乘8 =1/3×3/4×8 =2 12分之7x21分之8×10分之9 =7/12×8/21×9/10 =1/5 6分之5×4×5分之3 =5/6×4×3/5 =2。