列式计算:7.91×3+3×2.19 8.67-5.8 +1.33 853-147-25354×23+77×54 420÷28 1600-(720+650÷13)(103-141÷47)×5 7200÷25÷4 8×(40+20) 42÷(90÷30) 18÷(24÷4) 10.5-1.5-3.5145+78+255 125×32 656-164-366.84+0.6+1.4+5.16 54.25-2.14-7.86 4.8+0.2-4.8+0.2(148-111÷37)×9 127+885÷59×7 2.45+3.8+0.55(2296+7344÷36)×2.4 1÷0.45÷0.9-7/8 0.36×[(2+3.8)÷0.04] 68×35-408÷24 47.5-(0.6+6.4÷0.32) 44.08-44.08÷5.8 (309×17+375)÷84 3.35×6.4×2+6.7×3.63060÷15-2.5×1.04 75 ×23 +1415 ÷ 19 0.16+4÷(38 -18 )37 -[ 195 -(145 +47 )] 35 ÷ [(15 +13 )÷29 ]37 -[ 195 -(145 +47 )] 35 ÷ [(15 +13 )÷29 ]6÷35 -35 ÷6 (10000-0.16×1900)÷96 38 ×[89 ÷( 56 -34 )]168.1÷(4.3×2-0.4) 306×15 –2080 100-91 ÷13 (100-91)÷13 7.73-2.3÷0.5×0.8 1025-4050÷54 (100-19)÷(1.63+1.07)498+9870÷35 420.5 - 294÷2.8×2.8.82×15—100 5400-2940÷28×27 (20.2×0.4+7.88)÷4.221.6-0.8×4÷0.8 (9+92+93)×0.01 13.5×[1.5×(1.07+1.93)]1498+1068÷89 4.2÷1.5-0.36 0.54×1.75+8.25×0.5478 ×〔67 -(121 +37 ) (80-9.8)×0.6-2.1简算:45.55-(6.82+15.55) 34.52-17.87-12.23 6.43-(1.4-0.57)23.75-8.64-3.46 17.83-9.5-7.83-0.5