51加37分之34的和乘17分之1
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(51/100)x99+51/100=(51/100)x(99+1)=(51/100)x100=51
(24/29+16/17)×1/8+15/17=24/29×1/8+16/17×1/8+15/17=3/29+(2/17+15/17)=3/29+1=32/29
(11+20+37)x1/17+(19+38)x1/19再答:答案=4+3=7
解题思路:分数的简便计算问题,注意分数的结构问题可以进行变换解题过程:
17/25×5/37+8/25×17/37+17/37×2/25=5/25×17/37+8/25×17/37+17/37×2/25=17/37×(5/25+8/25+2/25)=17/37×15/25
17/25X5/37+8/25X17/37+17/37X24/25=17/25X5/37+17/37(8/25+24/25)=17/25X5/37+17/37X32/25=17/25X5/37+17/
(1/17+1/19)*20=2+(3/17+1/19)-----a(1/24+1/29)*30=2+(6/24+1/29)-----b(1/31+1/37)*40=2+(9/31+3/37)----
(5/12+1/19)×12+7/19=5/12×12+1/19×12+7/19=5+(12/19+7/19)=5+1=6
15分之1加17分之2的和乘15乘17=17+2*15=47
(5/6+15%)*24=5/6*24+15%*24=20+360%=23.6
51分之2加18分之5的和乘9乘17(2/51+5/18)×9×17=2/51×9×17+5/18×9×17=6+42.5=48.5
(7/13+8/13)×13/8×17/8=15/13×13/8×17/8=15/8×17/8
(17/25)×(5/37)+(8/25)×(17/37)+(17/37)×(2/25)=(5/25)×(17/37)+(8/25)×(17/37)+(17/37)×(2/25)=(5/25+8/25
894乘124减627分之267+123乘897除2008乘0.5分之2007乘(0.4加2008分之0.8)=894乘124减627分之267+123乘897除2008乘0.5分之2007乘502分
1/(1x4)+1/(4x7)+1/(7x10)+...+1/(2005x2008)=1/3*(1/1-1/4)+1/3*(1/4-1/7)+1/3*(1/7-1/10)+...+1/3*(1/200
原式=155/3x3/5+124/3x3/4+63/2x2/3=31+31+21=83
看到你问过一个类似的题目,三个连续自然数相乘的倒数,此题类似,考虑通式:(2n+3)/[n(n+1)(n+2)(n+3)]=(n+n+3)/[n(n+1)(n+2)(n+3)]=1/[(n+1)(n+
解题思路:根据题意,列出算式,在计算时应考虑用乘法分配律比较简便。解题过程:(1/4+2/9)×3.6=1/4×3.6+2/9×3.6=0.9+0.8=1.7
(8/17+8/13)*13/8*17/8=8/17*13/8*17/8+8/13*13/8*17/8=30/8=15/4
(2/69+2/71)*23+25/71=2*(69+71)/(69*71)*23+25/71=2*140/(69*71)*23+25/71=280/(3*71)+25/71=(280+25*3)/(