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脱式计算能简算的要简算2.5×1.6×1.25

1.6×2.5×7.5 =0.8x2x2.5x7.5 =0.8x2.5x(2x7.5) =2x15 =30 谢谢,请采纳

①2.5×1.25×32 =2.5×1.25×(4×8)=(2.5×4)×(1.25×8)=10×10=100 ②51×2443+51×1943=51×(2443+1943)=51×1=51③318÷58-159×127=258×85-149×97=5-2=3④0.65×201-0.65=0.65×(201-1)=0.65×200=130

①2.5×1.25×32,=2.5×1.25×4×8,=(2.5×4)×(1.25×8),=10×10,=100;② 5 11 × 2 7 + 6 7 × 2 11 ,= 5 11 × 2 7 + 2 7 × 6 11 ,=( 5 11 + 6 11 )× 2 7 ,=1× 2 7 ,= 2 7 ;③ 2006 2007 ×2008 ,= 2006 2007 ×(2007+1),= 2006 2007 ×20...

①1.25×4.8,=1.25×8×0.6,=10×0.6,=6; ②5.5×9.9+0.1×5.5,=(9.9+0.1)×5.5,=10×5.5,=55; ③3.45×102,=3.45×(100+2),=3.45×100+3.45×2,=345+6.9,=351.9;④3.17+0.83×1.6,=3.17+1.328,=4.498.

(1)25×7.6×0.8,=(25×0.8)×7.6,=20×7.6,=152;(2)23.7-3.9+6.3-6.1,=(23.7+6.3)-(3.9+6.1),=30-10,=20;(3)2.5×64×1.25,=2.5×(4×8×2)×1.25,=(2.5×4)×(1.25×8)×2,=10×10×2,=200;(4)1÷(1-0.98),=1÷0.02,=50;(...

(1)2.5×1.37×0.4,=2.5×0.4×1.37,=1×1.37,=1.37;(2)4.8×0.25,=1.2×4×0.25,=1.2×(4×0.25),=1.2×1,=1.2;(3)0.89×4.8+0.89×5.2,=0.89×(4.8+5.2),=0.89×10,=8.9;(4)101×0.78,=(100+1)×0.78,=100×0.78+1×0.78,=78+0.78...

(1)2.5×7.1×4,=(2.5×4)×7.1,=10×7.1,=71;(2)16.12×99+16.12,=16.12×(99+1),=16.12×100,=1612;(3)5.2×0.9+0.9×4.8,=0.9×(5.2+4.8),=0.9×10,=9;(4)[113-(34.15+38.25)]÷2,=[113-72.4]÷2,=40.6÷2,=20.3;(5)3.6÷...

①72.8÷2.5÷4,=72.8÷(2.5×4),=72.8÷10,=7.28;②0.83×7.2+0.83×2.8,=0.83×(7.2+2.8)=0.83×10,=8.3;③18.305÷0.14-58.67,=130.75-58.67,=72.08;④7.8×9.9,=7.8×(10-0.1),=7.8×10-7.8×0.1,=78-0.78,=77.22.

(1)8×1.09×1.25,=8×1.25×1.09,=10×1.09,=10.9;(2)1.5×106,=1.5×(100+6),=1.5×100+1.5×6,=150+9,=159;(3)1.65×4.3+8.35×4.3,=(1.65+8.35)×4.3,=10×4.3,=43;(4)3.8+7.19+5.2+3.91,=(3.8+5.2)+(7.19+3.91),=9+11.1...

(1)7.8÷1.25÷8=7.8÷(1.25×8)=7.8÷10=0.78(2)0.67×99+0.67=0.67×(99+1)=0.67×100=67(3)3.76×2.9-1.9×3.76=3.76×(2.9-1.9)=3.76×1=3.76(4)2.5×3.2×1.25=(2.5×4)×(0.8×1.25)=10×1=10(5)0.38+9.62÷3.7×5.2=0.38+2.6×5.2=0.38+13...

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