11.下面四根小棒中,哪三根不能围成一个三角形( )
①10cm ②8cm ③3cm ④7cm.
①10cm ②8cm ③3cm ④7cm.
A. | ①②③ | B. | ②③④ | C. | ①②④ | D. | ①③④ |
4.解下列方程:
0 157865 157873 157879 157883 157889 157891 157895 157901 157903 157909 157915 157919 157921 157925 157931 157933 157939 157943 157945 157949 157951 157955 157957 157959 157960 157961 157963 157964 157965 157967 157969 157973 157975 157979 157981 157985 157991 157993 157999 158003 158005 158009 158015 158021 158023 158029 158033 158035 158041 158045 158051 158059 199269
14+x=28.5 | 2.4x=26.4 | 4x+13=365 |
3x-2×7=40 | 96÷6+4x=56 | 4x+x=8.5 |