3124乘加188乘4的简便-搜答案-拍题作业网

33333×44444+22222×33334=33333×2×22222+22222×33334=66666×22222+22222×33334=22222×(66666+33334)=22222×

9.13×0.2+91.3×0.08=9.13×0.2+9.13×0.8=9.13╳（0.2+0.8）=9.13

36×56+72×22=36×2×28﹢36×2×22=36×2×﹙28+22）=36×2×50=3600

8.88×9+28×1.11＝1.11×8×9+28×1.11＝1.11×（72+28）＝1.11×100＝111

（10-0.4）X2835＝28350－1134＝272162.85X4＝11.4结果＝27237.4

5.6×8.8+0.56×12=5.6×8.8+5.6×1.2=5.6×(8.8+1.2)=5.6×10=56

24*71+24*56=(71+56)*24=3048

222×156+211×888=222×156+211×4×222=222×（156+211×4）=222×（156+844）=222×1000=222000

0.94乘2.5加0.094乘75=0.94x2.5+0.94x7.5=0.94x(2.5+7.5)=0.94x10=9.4

650乘56加560乘35=65x560+560x35=(65+35)x560=100x560=56000

24×78＋12×44＝24×78＋12×（2×22）＝24×78＋24×22＝24×（78＋22）＝24×100＝2400

=6.27×3.6+3.78×10×0.36=6.27×3.6+3.78×3.6=(6.27+3.78)×3.6=10.05×3.6=(10+0.05)×3.6=10×3.6+0.05×3.6=36+

75*23+25*23=3*25*23+25*23=(3+1)*25*23=4*25*23=100*23=2300

1×2+2×3+3×4+……+n（n+1）=1/3×n（n+1）（n+2）故原式=1/3×999×1000×1001=333333000再问：1/3×这是什么意思啊再答：就是三分之一乘以n乘以n+1乘

1/4*2003+2005*25+2004*1/4=1/4*(2003+2005+2004)=1/4*6012=15033375÷27x12=125x12=125x4x3=15006.6+0.6x20

7.6×7.3＋1.9×4×7.3＝7.6×7.3＋7.6×7.3＝2×7.6×7.3＝110.96

2.5*0.875+0.25*1.25=2.5*0.875+2.5*1.25/10=2.5*(0.875+1.25/10)=2.5*(0.875+0.125)=2.5请参考.

123乘7加627乘7=(123+627)x7=750x7=5250

0.25*19+0.25*3*25=0.25*94=0.25*100-0.25*6=23.5