北师大版精品试题
@温故知新@
23 + 56 12 +(34 - -38
) 56 -(13 + 310 )
85+165
365+121-92
5- 79 -29
2.解方程。
17 + x = 23 45 - x = 14
x - 16 = 38
12x — 9x = 8.7 x + 29 = 35
3x + 4x = 5.67
北师大版精品试题
@温故知新@
23 + 56 12 +(34 - -38
) 56 -(13 + 310 )
85+165
365+121-92
5- 79 -29
2.解方程。
17 + x = 23 45 - x = 14
x - 16 = 38
12x — 9x = 8.7 x + 29 = 35
3x + 4x = 5.67