99×99+198+1
=99²+2×99×1+1²
=（99+1）²
=100²
=10000
这类简算题要懂得观察就很简单的
猜你喜欢
- 1反相比例运算电路引入了负反馈是（）A电压串联 B电压并联 C电流串联 D电流并联
- 2已知y1=5x-8,y2=12x+6,当x取何值时,y1-1/3y2=2x?
- 34 5 9 1怎么等于24
- 4电冰箱的体积大约是200立方多少
- 5阅读课文《老山界》急!请各位帮帮忙!
- 6X平方减去2根号2X加Y的平方加2根号3Y加5等于0则X加Y的绝对值是多少
- 7They want to be (a ) because they are crazy about music.
- 8one should never think that he is perfect ,___others are all good for nothing.
- 9冬天到了,西北风呼呼地刮着（改成拟人句）
- 10a/b=3 a+b=80 c=280/(a-b) 问：a=() b=() c=()