Question

简便运算 148x99-652 = 4x200+0.4x500= 1+2+3+4...+99+100= 0.25x11+0.25=

(1.7x2.5x4.2)/(0.5x0.7x3.4)=

0.035x935+0.035+3x0.035+0.7x61x0.5=

20022003x20032002-20022002x20032003=

8457x8457-8456x8458=

64.2x87+0.642x1300=

038x76000-387x66+84x387+38.7x60=

20.02x37-200.2x1.9+2002x0.82=

0.999x1.3-0.111x2.7=

0.1+0.2+0.3+...+0.8+0.7+1=

99.9+0.2+0.9+9.9+0.2+999.9=

(1.28+1.28+1.28+1.28)x2.5=

(2002-2.002)/(4004-4.004)=

1.999x3.14+199.9x31.4-19.99x314=

1999+999x999=

我刚注册。。 给不了什么分。。 对不住.. 可实在不会写啊。呜呜

Answer 1

只说方法，不给结果

(1.7x2.5x4.2)/(0.5x0.7x3.4)=1.7与3.4约分；2.5与0.5约分；4.2与0.7约分；

0.035x935+0.035+3x0.035+0.7x61x0.5=提取公因数0.035；0.7x0.5=0.035

20022003x20032002-20022002x20032003=（20022002+1）x20032002-20022002x(20032002+1)

8457x8457-8456x8458=(8456+1)x8457-8456x(8457+1)

64.2x87+0.642x1300=提取64.2

038x76000-387x66+84x387+38.7x60=提取387

20.02x37-200.2x1.9+2002x0.82=每项都包含2002

0.999x1.3-0.111x2.7=0.111x2.7可以变为0.111x9x0.3=0.999x0.3

0.1+0.2+0.3+...+0.8+0.7+1=题目弄错了吧？这个…0.8换成0.9的话，就是5个1.1相加0.1+1；0.2+0.9；……0.5+0.6

99.9+0.2+0.9+9.9+0.2+999.9=0.2+0.2是4个0.1

(1.28+1.28+1.28+1.28)x2.5=4x1.28x2.5 乘法交换律

(2002-2.002)/(4004-4.004)=分母提取2

1.999x3.14+199.9x31.4-19.99x314=后两项是一样的

1999+999x999=1000+999+999x999后面两项提取公因式

以上

Answer 2

12222

Answer 3

(1.7x2.5x4.2)/(0.5x0.7x3.4)
=1.7x2.5x4.2/0.5/0.7/3.4
=/(3.4*1.7)*(2.5/0.5)*(4.2/0.7)
=/2*5*6
=15

Answer 4

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