2.观察算式的特点,并计算
336×[(36-29)×3] | (249+591)÷8×24 | 567-(367-249) | 234+66×123 |
146+(367+254) | 25×68×4 | 96×125 |
20.去掉小括号后计算结果不变的是( )
A. | 314-(99-17) | B. | (205-24)÷4 | C. | (360÷9)×6 | D. | (121+35)×2 |
19.用一副三角尺拼不出来的角是( )
A. | 75° | B. | 105° | C. | 135° | D. | 25° |
18.796×4□≈35000,□中应该填( )
A. | 1 | B. | 2 | C. | 4 | D. | 9 |
17.如图,笑笑要从O点到公路AE上,沿线段( )走最近.
A. | OA | B. | OB | C. | OC | D. | OD | ||||
E. | OE |
16.下面各数一个0都不读的是( )
0 164977 164985 164991 164995 165001 165003 165007 165013 165015 165021 165027 165031 165033 165037 165043 165045 165051 165055 165057 165061 165063 165067 165069 165071 165072 165073 165075 165076 165077 165079 165081 165085 165087 165091 165093 165097 165103 165105 165111 165115 165117 165121 165127 165133 165135 165141 165145 165147 165153 165157 165163 165171 199269
A. | 407005000 | B. | 40705000 | C. | 40700005 | D. | 4070005000 |