1、初一七年级四则混合运算 70 题4 -(2.5+1.9)(0.5-0.5) 4 -2.5+1.9(0.5-0.5)25 254 -2.5+1.90.5-0.5 4 -(2.5+1.90.5)-0.525 254 -(2.5+1.9) (0.5-0.5) 4 -(2.5+1.9) 0.5-0.525 2512 -4 -2 -5 -12.5% 0.125 + 8.25+12.5%13 12 14 18 3418( + ) 2.5 0.42 15 -2.25-7 781316 1316 37 13 314 3410( -0.5) (2.7-4.25 )2.8 +( - ) 45 37 25 47 8
2、9 1516 71614 121.25+1 7.4+125% 10-4.687.2+0.05 14 581 (5 - 5) 18.09(1.5+2 )3.75- 57 5656 23 230.840.3(1.9618.9) -(0.15+ ) 1.8 1325+5401815 56 9202.58+9.5 +40.125 2.1+7(3 -1.625) 118 112 232.5 -2.1 +9.63 (7 +7 2+7 )4 3.8+1 +6.2+325 13 13 13 13 314 27(4 -3.5) (2 + -1 )12 2.58+3.5 +0.12527 13 58 3423 5
3、6 18(9.5+9 +9 +9.5) 12 3 -(1 + 1 )112 12 12 13 5718 34 25(0.05+ )0.25- 125% 5.350.25+2.6514 25 382+498 381382 498-116 14(3 + -2 )(1 80%) 4.20.7+6 ) (1 )1334 58 15 125 526 38 35 13( - ) 4 1- - 13 34 23 15 35 14 25 611 2122 37 ( ) ( ) 【( ) 】710 45 13 1415 89 34 13 15 324215 ( ) 65348541932218543( ) 【 ( ) 】 21653161794321240353 5 0.125 543252130787 1327413252147685367( )88 1348( ) ( )( ) 1783126871659327 【1( ) 】 1387136418397512( )12 2 996143213692109 45435212107654143( ) ( ) 4( ) 83418341658732