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7.5÷0.4 12.6×2 7.7÷1.4

原式=(12.6÷1.4)×(7.6÷1.9)×(2.32÷2.9) =9×4×0.8 =36×0.8 =28.8 望采纳,谢谢

原式 =(12.6÷1.4)x(7.6÷1.9)x(2.32÷2.9) =9x4x0.8 =36x0.8 =28.8 供参考。

x=7-1.2 x=5.8 x=12.6➗6 x=2.1

解:3.5×0.4=1.4 2.5×0.4=1 2.3×0.2=0.46 2.1÷0.3=7 7.1×0.4=2.84 4.5÷0.15=30 1-0.07=0.93 0.42÷0.7=0.6 12.4÷4=3.1 2.5+1.5=4 5.9×0.2=1.18 0.48÷0.8=0.6 0.25×1.3×4=1.3 20÷0.01=2000 9÷0.01=900 5.5÷1.1=5 4.79+15.81=20.6 0.3÷0.03=10 0.2...

3.5×0.4=1.4 2.5×0.4=1 2.3×0.2=0.46 2.1÷0.3=7 7.1×0.4=2.84 4.5÷0.15=30 1-0.07=0.93 0.42÷0.7=0.6 12.4÷4=3.1 2.5+1.5=4 5.9×0.2=1.18 0.48÷0.8=0.6 0.25×1.3×4=1.3 20÷0.01=2000 9÷0.01=900 5.5÷1.1=5 4.79+15.81=20.6 0.3÷0.03=10 0.2×0.1...

(1)35.6+(12.6-4.4),=35.6+8.2,=43.8;(2)90÷0.4÷2.5,=90÷(0.4×2.5),=90÷1,=90;(3)0.86×15.4-14.4×0.86,=0.86×(15.4-14.4),=0.86×1,=0.86;(4)5.4÷0.6+(2.3-0.46),=5.4÷0.6+1.84,=9+1.84,=10.84;(5)7.52×10.1,=...

(1)2.5+7.5÷5,=2.5+1.5,=4;(2)12.6+4.5÷3-12.7,=12.6+1.5-12.7,=14.1-12.7,=1.4;(3)9999×2222+3333×3334,=(3333×3)×2222+3333×3334,=3333×(3×2222)+3333×3334,=3333×(6666+3334),=3333×10000,=33330000;(4)2.9×6.7+2...

(1)12.6-0.84×5÷1.4,=12.6-4.2÷1.4,=12.6-3,=9.6;(2)2.8×0.25+7.2×0.25,=(2.8+7.2)×0.25,=10×0.25,=2.5;(3)7.24×[1÷(3.1-3.09)],=7.24×[1÷0.01],=7.24×100,=724;(4)0.18×(4.6-0.598÷0.46),=0.18×(4.6-1.3),=0.18×...

510÷10=51510÷100=5.15.1×10=515.1×100=5100.12×6=0.727.8÷3=2.60.606÷0.3=2.026.4÷0.8=80.125×8=12.8÷1.4=20.25÷0.5=0.59.6÷0.24=405.25÷5=1.050.12×0.5=0.62.8-1.43=1.377.21÷7=1.038.1÷0.03=1702.8+1.43=4.230.42÷0.14=3100-16.8=83.2

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