199+298+397+…+991+1090+1189+…+9802+9901=______.
199+298+397+…+991+1090+1189+…+9802+9901=______.
小数的计数单位是______、______、______….
27÷______=______…3.上式______里填入适当的数,使等式成立,共有______种不同的填法.
125×(4+8)=______×______+______×______.
填质数:21=______+______=______×______=______-______.
找规律,填一填.0.2、0.6、1.8、______、16.2、______、______…..
3.76°=______度 ______分 ______秒.
100×199-199×198+198×197-197×196+…+2×1=______.
(101+103+…+199)-(90+92+…+188)=______.
填上适当的质数.24=______+______=______+______=______+______.
20082-20072+20062-20052+…+22-12=______.
-1-2-3-4-…-100=______.