1、简便计算练习题2704 2532125 32(25+125)88 10276 5898178101178 8436+648499+27583102832 98199123181233+8512350(344)3(24+16) 17899+1787942+79+7957 730025 8100416800120 301002100 32000400 2150049700700 1248 315015 4800简便计算练习题32356(1356721) 1235(17801665)27+192 531870+13310 4(2565+2528)(300+6)x12 25x(4+8)125x(35+
2、8) (13+24)x884x101 504x25 78x102 25x20499x64 99x16 638x99 999x9999X13+13 25+199X25 32X16+14X32 78X4+78X3+78X3125X32X8 25X32X125 88X125 72X125简便计算练习题4 3600 30001258 12505 1200-624-76 2100-728-772273-73-27 847-527-273278+463+22+37 732+580+2681034+780320+102 425+14+186214-(86+14) 787-(87-29)365-(65+118
3、) 455-(155+230)576-285+85 825-657+57 690-177+77 755-287+87871-299 157-99363-199 968-599 简便计算练习题5 600-60 20X420X4736-35X20 25X425X498-18X5+25 56X856X8280-80 4 12X612X6175-75 25X825X880-20X2+60 36X936X936-366-6(25X8)100+45-100+45 15X97+3100+1-100+1 48X99+11000+8-1000+8 5+95X28102+1-102+1 65+35X13 25+7
4、5-25+75 40+36020-1013+24X8 672-36+64 324-68+32 100-36+64简便计算练习题626396126 3569569 9955557810178 527647767613456134451344852244823(404) 999999199918498 695202 864199 738301380476120(569468)(432131) 7042525614753 37312929 189(8974)284 125 972125简便计算练习题7720165 63042 456(25636)10235 98 158+262+138 375+21
5、9+381+22550012471021232 378+44+114+242+222276+228+353+219 99+999+9999+9999930657381065 899+344 497299 2370+1995简便计算练习题8 1883398 12 8898 123 50 797300 158+262+138简便计算练习题91248 (181+2564)+2719(2130+783+270)+10172214+638+286 236510862142370+1995 3999+498简便计算练习题10 138(12+24+80)84 83 16800简便计算练习题11(ab) c
6、= a (bc)2.73 0.89 1.274.37 0.28 1.63 5.72abc = a (bc)10 0.432 2.568 9.3 5.26 2.7414.9(5.24.9) 18.32 5.47 4.32(a b)c = a (b c)25 6.8 0.04 0.25 32 0.125 6.4 1.25 12.5c (a+b)= ca cb0.45 201 0.58 10.1 50.2 99 4.7 9.9简便计算练习题123.28 5.7 6.72 5.7 2.1 99 2.123 0.1 2.3 0.18 4.26 0.18 4.260.58 1.3 1.3 7.3 4 2.
7、7 0.253.75 0.5 2.75 2 5.26 0.125 2.74 8a b c = a (b c)6.3 1.8 9.5 (1.9 8) 12.8 (0.4 1.6)930 0.6 63.4 2.5 0.4 (7.7 1.54) 0.7简便计算练习题136.94.83.1 15.89(6.755.89)7.852.340.854.6635.61.815.67.2 13.75(3.756.48)47.87.45+2.5566.868.661.34 0.2516.20.2532 0.1252 .5 (4 +0.4) (1.250.125) 4.8100.14.299 56.59.956.5 7.0910.80.87.093.834.563.835.44 3.654.736.50.3713.70.253.7 10.716.1-1.110.7 +10.7
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