1、简便计算练习题270432125 (25+125) 8810276 5898 178101178 8436+6484 99+275 83102832 98199 123181233+85123 50(344)3 (24+16) 99+178 7942+79+7957 7300258100416800120 301002100 32000400 21500125 49700700 124824 3150154800简便计算练习题32356(1356721) 1235(17801665) 27+192 5 31870+13310 4(2565+2528) (300+6)x1225x(4+8)125
2、x(35+8)(13+24)x884x101504x2578x10225x20499x6499x16638x99999x9999X13+1325+199X2532X16+14X32 78X4+78X3+78X3125X32X825X32X12588X12572X125简便计算练习题4360047530001258125051200-624-76 2100-728-772273-73-27847-527-273278+463+22+37732+580+2681034+780320+102 425+14+186 214-(86+14)787-(87-29) 365-(65+118) 455-(15
3、5+230)576-285+85825-657+57690-177+77755-287+87871-299157-99363-199968-599178X101-178 83X102-83X2 17X23-23X7 35X127-35X16-11X35简便计算练习题5600-6020X420X4 736-35X20 25X425X498-18X5+2556X856X8 280-80 412X612X6175-752525X825X8 80-20X2+6036X936X936-366-6(25X8) 100+45-100+4515X97+3100+1-100+148X99+1 1000+8-10
4、00+8 5+95X28102+1-102+1 65+35X13 25+75-25+75 40+36020-1013+24X8672-36+64 324-68+32100-36+64简便计算练习题626396126 3569569 995555 7810178 5276477676 1345613445134 482448 23(404) 9999991999 18498695202 864199738301 380476120 (569468)(432131) 7042525614753 37312929 189(8974) 28125972简便计算练习题772016563042456(25
5、636)35 9842 50012471021232 (181+2564)+2719 276+228+353+219 (375+1034)+(966+125)(2130+783+270)+1017 99+999+9999+99999 2214+638+286 30657381065 2357183317357 23651086214 2370+1995 简便计算练习题83999+498 8) (12+24+80)50 (25+125)76 1233 99+178 57 75 158+262+138简便计算练习题915 (181+2564)+2719 276+228+353+219 (2130+
6、783+270)+1017 99+999+9999+99999 899+344 497299 简便计算练习题10(25+125) 98 84199 123 (24+16)125简便计算练习题11(ab) c = a (bc) 2.73 0.89 1.27 4.37 0.28 1.63 5.72 abc = a (bc) 10 0.432 2.568 9.3 5.26 2.74 14.9(5.24.9) 18.32 5.47 4.32 (a b)c = a (b c) 25 6.8 0.04 0.25 32 0.1256.4 1.25 12.5 c (a+b)= ca cb 0.45 201 0
7、.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 9.9 0.18 4.26 0.18 4.26 1.3 0.58 1.3 7.3 4 2.7 0.25 3.75 0.5 2.75 2 5.26 0.125 2.74 8 a b c = a (b c)6.3 1.8 9.5 (1.9 8) 12.8 (0.4 1.6)930 0.6 5 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+2.55 66.868.661.34 0.2516.232 0.125 2 .5 (4 +0.4) (1.250.125)8 4.8100.14.299 56.59.956.5 7.0910.80.87.093.834.563.835.44 3.654.736.50.37 13.70.253.710.716.1-1.110.7 +10.7 5.411-5.4
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