精心整理四年级下册简便运算题1、56124=(56241=801=1112、615+45H25=615(45125=615600=1215、125X64=125X8X8=1000X8=80004、8+101+111=101(8111=101200二0、+韦7+7=()7(7)7=00700=00、00-7-7=00(7)7=0000=07、47(9-)7=779=009二98,70X98=70X(00)=70000=80、442—10—142=44214210=0010=1710、++=100010010=1110=110711,67X5X2=67X(5X2)=67X10=67012,25X(78X4)=25X4X78=100X78=78001、72X125=9X(8X125)=9X1000=900014、9000十125十8=9000十(125X8)=9000十1000=915、400十25=400十100X4=4X4=1616,25X36=25X4X9=100X9=90017,103X27=(1003X27=2700+1=2711、76X102=76X（100+2）=7600+152=775219、3600十25十4=3600十（25X4）=3600十100=3620、99X35=（1001X35=350035=346521、（25＋12）X4=25X4+12X4=100+4=14822,56X27+27X44=(5644X27=100X27=270023,56X99+56=56X(991=56X100=560024,125X25X8X4=125X8X(25X4)=1000X100=10000025,25X32X125=(25X4)X(8X125)=100X1000=100000精心整理
