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下面各题,能用简便方法计算的用简便方法计算:2.5...

(1)2.5×12.5×32=(2.5×4)×(12.5×8),=10×100,=1000;(2)6.4÷2.5÷0.4=6.4÷(2.5×0.4),=6.4÷1,=6.4;(3)5.4×0.36+0.64×5.4=5.4×(0.36+0.64),=5.4×1,=5.4;(4)9÷0.75+9÷0.25=12+36,=48;(5)17.2-0.71-0.29=17.2-(0.71+0.29...

4.8×0.25=(4+0.8)×0.25=4×0.25+0.8×0.25=1+0.2=1.2 0.78×98=0.78×(100-2)=0.78×100-0.78×2=78-1.56=76.44 0.5×2.33×8=(0.5×2)×4×2.33=1×4×2.33=9.32 1.5×105=1.5×(100+5)=1.5×100+1.5×5=150+7.5=157.5 0.3×2.5×0.4=(2.5×0.4 )×0.3=1×0...

①486-23×16,=486-368,=118;②2.5×3.2×1.25,=2.5×0.4×8×1.25,=(2.5×0.4)×(8×1.25),=1×10,=10;③3.5×2.6-4.5,=9.1-4.5,=4.6;④7- 4 5 ÷2- 3 5 ,=7- 2 5 - 3 5 ,=7-( 2 5 + 3 5 ),=7-1,=6;⑤[1-( 1 4 + 3 8 )]÷ 1 4 ,=[1- 5 ...

原式=2.5×(7.8-3.8) =2.5×4 =10

2.2×2.5+1.8×2.5 =2.5×(2.2+1.8) =2.5×4 =10

原式=(2.5×4)×4.025 =10×4.025 =40.25

1.58÷12.5÷2.5÷6.4=0.0079 ~回答完毕~ ~\(^o^)/~祝学习进步~~~

(1)2272-6360÷24=2272-265,=2007;(2)[6.85-(0.65+0.7)]÷2.5=[6.85-1.35]÷2.5,=5.5÷2.5,=2.2;(3)( 9 10 - 4 5 × 5 8 )÷ 5 12 =( 9 10 - 1 2 )× 12 5 ,= 2 5 × 12 5 ,= 24 25 ;(4)( 5 8 + 1 27 )×8+ 19 27 = 5 8 ×8 + 1 ...

4.8×0.25 =1.2×4×0.25 =1.2×1 =1.2 2.33×0.5×4 =2.33×2 =4.66 1.5×105 =1.5×(100+5) =1.5×100+1.5×5 =150+7.5 =157.5 1.2×2.5+0.8×2.5 =2.5×(1.2+0.8) =2.5×2 =5

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