1、一、计算 3× ×3 2× 5× 6× ×2 3× ×12 10× ×16 7× 4× 21× 12×1 12× 12× 1×3 ×3 ×3 5×2 ×2 ×2 5× ×6 100× ×4 21× ×4 ×
2、 × × × × × × × × × × × × × × 75× ×140 × ×9 × × × × × ×2 × × × × 2× 7× ×5 ÷2 ÷3 ÷
3、6 ÷12 ÷5 ÷9 ÷10 ÷6 2÷ 2÷ 2÷ 8÷ ÷3 6÷ ÷ ÷ ÷4 ÷ ÷ ÷7 ÷ 6÷ 6÷ 6÷1 6÷ 6÷ 8× ÷4 ÷ ÷4 ÷ × ÷ ÷ 7÷
4、 + ÷2 100× × 12÷ ÷ × ÷ ÷ - 24× 1÷ 5÷2 ×7 ÷12 × 100× 28× ÷ × ×18 × 1÷ - 二、脱式计算 12×× ×÷ 12÷÷ ÷× ×× 2÷(×) ×(1÷) 12÷(÷) ×6× ×× ×1
5、7+×17 ×(×) (+)×17 +3× 18×(3-) ÷3- 4÷÷ ×+× +÷ ×× 9×+÷9 12×(+-) ×× ×÷ (1+)×10 36×+36× 4÷- 98÷(÷) 21×(1+) 12×(÷) ×24+24× ×÷ +÷ - × (- )× 22÷(+) ÷3- 1÷(÷) +- 35÷(÷) ×(- ) ××39 ×5 +×5 - × ×+
6、三、解方程 3x= x=10 x=25 x= x=6 x=7 x=4 x= 8x= x =6 x =1 x= x=54 x=35 x =16 1.5x =28.5 8x=42 4+x=102 x-x= x-0.8x=22 20% x = 30 x+x=42 x-= x+=6 6 x+x=9 2x -x=
7、 x+=12 x-x =15 x = x-x =120 x ÷ = 5 + x =13 四、直接写得数 3×= ×3= 2×= 5×= 6×= ×2= 3×= ×12= 10×= ×16= 7×= 4×= 21×= 12×1= 12×= 12×= 1×3= ×3= ×3= 5×2= ×2= ×2= 5×= ×6=
8、 100×= ×4= 21×= ×4= ×= ×= ×= ×= ×= ×= ×= ×= ×= ×= ×= ×= ×= ×= ×= 75×= ×140= ×= ×9= ×= ×= ×= ×= ×= ×2= ×= ×= ×= ×= 2×= 7×= ×5= ÷2= ÷3= ÷6= ÷12= ÷5= ÷9= ÷10= ÷6= 2÷
9、 2÷= 2÷= 8÷= ÷3= 6÷= ÷= ÷= ÷4= ÷= ÷= ÷7= ÷= 6÷= 6÷= 6÷1= 6÷= 6÷= 8×= ÷4= ÷= ÷4= ÷= ×= ÷= ÷= 7÷= += ÷2= 100×= ×= 12÷= ÷= ×= ÷= ÷= -= 24×= 1÷= 5÷2= ×7= ÷12= ×= 28× ÷= ×= ×18= ×= 1÷= -= 100×=






