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=20.02x3

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