整数乘除法简便计算分类练习题1、凑整2532125=(25 4) (8 125)=1001000=10000093712525 64 5=937(125 8)(25 4) (5 2)=937100010010=937000000801625125=(80 125) (25 4) 4 =100001004=40000001255325=(125 8) (5 2) (5 2)=10001010=10000056125=7(8 125)=71000=70002、利用乘法分配律简算46 101=46(100+1)=46100+461=4600+46=464617 999=17(1000-1)=17000-17=1698312598=125(100-2)=12500-250=1225037 99=37(100-1)=3700-37=3663234102=234(100+2)=23400+468=238681(100 4) 25=10025-4 25=2500-100=24003、逆用乘法分配律简算95719529=95(71+29)=95100=95006425352525=25(64+35+1)=25100=250012323524 235235=235(123-24+1)=235100=23558612429 58658653=586(124+29-53)=586100=5860062383838=38(62+38)=38100=3800541544554549=54(154-45-9)=54100=5400671267356752 67=67(12+35+52+1)=67100=67004、利用商不变的性质简算 ( 分子分母同时乘以相同的数、商不变 )21000125= 210008(125 8) =168000 1000 =1681105=1102 (5 2)=22010=2244000125=440008(125 8)=352000 1000=35247700900=47700100(900 100)=4779=5325、利用除法分配律简算(99 88) 11= 99 11+8811 =9+8 =1725131413 =(25+14) 13 =3913=313959=(13+5) 9=189=2315325335345=(31+32+33+34) 5=1305=261871263125212=(187-63-52)12=7212=6(12 243648) 6=12 6+246+366+486=2+4+6+8=2021565=(21-6)5=155=36、利用乘除法的带符号“搬家”进行简算3604060=360 6040=640=24099883322=(99 33) (8822)=32=62789=2798=38=24684=648=248=37、乘除同级运算的去括号法则25(4 43)=25443=100433=43003522211145000(25 90)=35(222111)=4500090252=35=50025=70=2037500425125(8 37)=37500 (425)=125837100=37500=100037=375=37000610001258562397(281 397)=610008)(125=(562 281) (397397)1000=61000=21=61=25600(1400 4)=560014004=44=168、乘除同级运算的括号法则310008125=31000 (8125)=310001000=311320500250=1320 (500250)=13202=26404