有理数的混合运算 50题 2223( 23 ) 11( 5 )() 555 7 .20 .95 .61 .7 232( 1 ) 67()()51 31 3 211()1722 737()()848 21( 5 0 )()51 0 2( 3 )2 12411()()()23523 11( 1 .5 )42 .7 5( 5)42 8( 5 )6 3 3145()2 25()()( 4 .9 )0 .656 22( 1 0 )5()5 323( 5 )()5 25( 6 )( 4 )( 8 ) 1612()(2 )472 2( 1 65 03)( 2 )5 32( 6 ) 8( 2 )( 4 )5 21122()(2 )2233 1 9 9 711(10 .5 )3 2232[ 3()2]23 232()(1) 043 4211(1 0.5)[2( 3) ]3 4( 81)( 2.25)() 169 215[ 4(1 0.2)( 2)]5 666( 5) ( 3 )( 7)( 3 ) 12 ( 3 )777 235() ( 4)0.25 ( 5) ( 4)8 23122( 3)(1 )6293 21374215.7738 71471531311 2 5.032813 959 14 9 614131210 5.47 5.32 5.0433411211 (–1 .7 6 ) +(–1 9 .1 5 ) + (– 8 .2 4 ) 2 3 +(–1 7 ) +( +7 ) +(–1 3 ) ( + 3 41) +(–2 53) + 5 43+(–8 52) 52+1 12+(–52) 2、 3 41–(+5)–(–1 43) +(–5) – 99 + 100– 97 + 98– 95 + 96–……+2 – 1– 2– 3– 4–……–100 (–4)×(–9) +(–52)×81 (–6)×0 -(–2 53)×135 100×(0.7– 103– 254+ 0.03) (–11)×52+(–11)×9 53 [ 65÷ (– 21– 31)+2 81]÷ (– 1 81) (–18)÷(–9) +(–63)÷(7) 0÷(–105) +1÷(–9) (–5 )×8 ×(–7 )+(–6 )×(–5 )×(–7 )-(–1 2 )×2 .4 5 ×0 ×9 ×1 0 0