1、一、计算3 3 2 5 6 2 3 12 10 16 7 4 21 121 12 12 13 3 3 52 2 2 5 6 100 4 21 4 75 140 9 2 2 7 5 2 3 6 12 5 9 10 6 2 2 2 8 3 6 4 7 6 6 61 6 6 8 4 4 7 2 100 12 24 1 52 7 12 100 28 18 1 二、脱式计算12 12 2()(1) 12() 6 1717 () ()17 3 18(3) 3 4 99 12() (1)10 3636 4 98() 21(1+) 12() 24+24 + - (- ) 22(+)3- 1() +- 35()
2、 (- ) 395 +5 - +三、解方程3x= x=10 x=25 x= x=6 x=7 x=4x= 8x= x =6 x =1 x= x=54 x=35x =16 1.5x =28.5 8x=42 4+x=102 xx= x0.8x=22 20% x = 30xx=42 x= x=6 6 xx=9 2x x= x=12xx =15 x = xx =120 x = 5 + x =13 四、直接写得数3= 3= 2= 5= 6= 2= 3= 12= 10= 16= 7= 4= 21= 121= 12= 12=13= 3= 3= 52= 2= 2= 5= 6=100= 4= 21= 4= = = = = = = = = = = = = = = 75= 140= = 9= = = = = 2= = = = 2= 7= 5= 2= 3= 6= 12=5= 9= 10= 6= 2= 2= 2= 8=3= 6= = = 4= = = 7= = 6= 6= 61= 6= 6= 8= 4= 4= = = = = 7= =2= 100= = 12= = = = = 24= 1= 52= 7= 12= = 28= = 18= = 1= = 100=