1、(38) 第二种3600254 810008125 370005020 125056300(2563) 3900(3925) 420(57) 800(208)第三种 84x101 504x25 78x202 125x804 70425 10587 88125 25444 99x64 199x16 638x99 999x99 98499 5898 99 x27 998 x3493X13+13X7 25+999X25 32X16+14X32 17899+1787942+79+7957 6436+3636 78X4+78X3+78X3 6950+5069 178X101-178 83X102-83X
2、2 17X23-23X7 8310283285X54+85X53-7X85 35X127-35X16-11X35 123181233+85123 第七种125x(4+8) (4+8)x25 (2+20+200)50 (125+2)x8挑战题:465+2528) 99991111+66673333 395283254395283 2541727+1705+1723 999222+334333 9+99+999+9999+999991+2+3+4+5+6+7+817+18+19+20 易 错 题班级_学号_姓名_600-601520X420X4 736-35X20 25X425X498-18X5+
3、2556X856X8 280-80 412X612X6175-752525X825X8 80-20X2+6036X936X936-366-6(25X8) 100+45-100+4515X97+3100+1-100+148X99+1 1000+8-1000+8 5+95X28102+1-102+1 65+35X13 25+75-25+75 40+36020-1013+24X8 672-36+64 324-68+32 100-36+64简便计算综合练习题1姓名 得分 26396126 3569569 995555 7810178 5276477676 1345613445134 48522448
4、2523(404) 9999991999 18498 695202 864199 738301 380476120 (569468)(432131) 7042525614753 37312929 189(8974) 2825 1253225 972125 简便计算练习题2720165 63042 456(25636)10235 9842 158+262+138 375+219+381+225 50012471021232 (181+2564)+2719 378+44+114+242+222 276+228+353+219 (375+1034)+(966+125) (2130+783+270)+
5、1017 99+999+9999+99999 7755(2187+755) 2214+638+286 30657381065 899+344 2357183317357 23651086214 497299 2370+1995 7755(2187+755) 简便计算练习题33999+498 1883398 1225 7524 138254 (138) (12+24+80)50 125 32(25+125) 88125 10276 178101178 8436+6484 7599+275 199 123123 50(344)3 (24+16) 17899+178 7957 73004 81004
6、75 158+262+138简便计算练习题4124824 315015 480025 2150016800120 301002100 32000400 49700700 375+219+381+225 50012471021232 (181+2564)+2719 378+44+114+242+222 276+228+353+219 (375+1034)+(966+125) (2130+783+270)+1017 99+999+9999+99999 7755(2187+755) 2214+638+286 30657381065 899+344 3999+498 2357183317357 236
7、51086214 497299 简便计算练习题51224 1388) (12+24+80)50 70425 25(25+125) 8876 5898 178101178 8484 7575 832 98199 1233 25(24+16) 57 2150012575 16800120 简便计算练习题6(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 0.0
8、4 0.25 32 0.125 6.4 1.25 12.5 c (a+b)= ca cb 0.45 201 0.58 10.1 50.2 99 4.7 9.9 简便计算练习题73.28 5.7 6.72 5.7 2.1 99 2.1 23 0.1 2.3 9.9 0.18 4.26 0.18 4.26 0.58 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86.94.83.1 15.89(6.755.89) 7.852.340.854.66 35.61.815.67.2 13.75(3.756.48) 47.87.45+2.55 66.868.661.34 0.2516.24 0.2532 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 5.411-5.413.70.253.74 10.716.1-1.110.7 +10.7 5
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