总述:本次共解3题。其中
☆算术计算3题
〖1/3算式〗
作业:求算式 8+88+888+8888+88888+888888+8888888+88888888+888888888+8888888888+88888888888 的值.
题型:数学计算
解:
8+88+888+8888+88888+888888+8888888+88888888+888888888+8888888888+88888888888
=96+888+8888+88888+888888+8888888+88888888+888888888+8888888888+88888888888
=984+8888+88888+888888+8888888+88888888+888888888+8888888888+88888888888
=9872+88888+888888+8888888+88888888+888888888+8888888888+88888888888
=98760+888888+8888888+88888888+888888888+8888888888+88888888888
=987648+8888888+88888888+888888888+8888888888+88888888888
=9876536+88888888+888888888+8888888888+88888888888
=98765424+888888888+8888888888+88888888888
=987654312+8888888888+88888888888
=9876543200+88888888888
=98765432088 答案:8+88+888+8888+88888+888888+8888888+88888888+888888888+8888888888+88888888888=98765432088〖2/3算式〗
作业:求算式 (2+4+6+8+10+12+14+16+18+20)-(1+3+5+7+9+11+13+15+17+19) 的值.
题型:数学计算
解:
(2+4+6+8+10+12+14+16+18+20)-(1+3+5+7+9+11+13+15+17+19)
=110-(1+3+5+7+9+11+13+15+17+19)
=110-100
=10 答案:(2+4+6+8+10+12+14+16+18+20)-(1+3+5+7+9+11+13+15+17+19)=10〖3/3算式〗
作业:求算式 365+364-363-362+361+360-359-358+357+356-355-354+353+352-351-350+349 的值.
题型:数学计算
解:
365+364-363-362+361+360-359-358+357+356-355-354+353+352-351-350+349
=729-363-362+361+360-359-358+357+356-355-354+353+352-351-350+349
=366-362+361+360-359-358+357+356-355-354+353+352-351-350+349
=4+361+360-359-358+357+356-355-354+353+352-351-350+349
=365+360-359-358+357+356-355-354+353+352-351-350+349
=725-359-358+357+356-355-354+353+352-351-350+349
=366-358+357+356-355-354+353+352-351-350+349
=8+357+356-355-354+353+352-351-350+349
=365+356-355-354+353+352-351-350+349
=721-355-354+353+352-351-350+349
=366-354+353+352-351-350+349
=12+353+352-351-350+349
=365+352-351-350+349
=717-351-350+349
=366-350+349
=16+349
=365 答案:365+364-363-362+361+360-359-358+357+356-355-354+353+352-351-350+349=365你的问题在这里没有得到解决?请到 热门难题 里面看看吧!