7200÷(72x25)简便算法-搜答案-智慧作业帮

好评再答：先×

简便计算120x25/119

120x25/119=(119+1)x25/119=119x25/119+25/119=25+25/119=25又25/119

(0.75x42.6-0.574x25+57.4)/3=(0.75x42.6-57.4x0.25+57.4x1)/3=(0.75x42.6+57.4x1-57.4x0.25)/3=[0.75x42.6

1）3.5x0.25+360x0.25+0.25x36.5=0.25x(3.5+360+36.5)=100.2)(7.25x0.4+2.75x0.4）/0.1=0.4x(7.25+2.75)/0.2=

3.2X1.25=1.25x8x0.4=10x0.4=42.33X0.5X4=2.33x2=4.661.5X105=1.5x100+1.5x5=150+7.5=157.51.2X2.5+0.8X2.5

（o.75x42.6—o.574x25+57.4)÷3=（o.75x42.6+（—57.4x0.25+57.4）)÷3=0.75x(42.6+57.4)÷3=0.25x100=25

302x25=(300+2)x25=300x25+2x25=7500+50=7550

(17/42)x29+(29/42)x25=(29/42)x17+(29/42)x25=(29/42)x(17+25)=(29/42)x42=29

单选两题（2x25)

解题思路：单选两题解题过程：1.由于受spend…doingsth.句型的影响，容易误用locking。lock的逻辑主语I和lock之间存在被动关系，故用过去分词做伴随状语。所以用lo

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、（20+4）x25=20x25+4x25=500+100=6002、35x37+65x37=(35+65)x37=100x37=37003、25x41=25x(40+1)=25x40+25x1=1

4×4×25=40099×（99+1）=99×100=9900再答：（100+2）×25=100×25+2×25=2550再答：（20×5）×273=100×273=27300再答：（100-2）×3

(8-0.8)x25=8x25-0.8x25=200-20=180

25X32÷8＋36÷12x25=25×4+3×25=100+75=175

5X64X25X125X93=5X2×4×8X25X125X93=(5X2)×(4X25)×(8X125)X93=93X10×100×1000=93000000（1-1/3-2/5-1/4）X60=1

25％X+3=三分之二x60.25X=4-30.25X=1X=1÷0.25X=4五分之九x25％+2.2—0.25=1.8×0.25-0.25+2.2=(1.8-1)×0.25+2.2=0.8×0.2

128-（26+54）/80=12772X25=9X2X4X25=18X100=1800乘法的交换律

900/25=9x100/25=9x4=36720x25=180x4x25=180x100=180004000/125=4x1000/125=4x8=32再问：100/25、4x25、1000/125