文档介绍：口算32×3= 60×3= 18×10= ×100= 6÷100=49×2= 12×7= 24×100= ×100= ÷100=43×4= 72×5= ×10= ÷10= ÷100=32×4= 82×5= ×100= ÷100= ÷10= 口算 14×9= ×2= ×200= 23×= ×3=17×8= 5×= ×40= ×80= ×7=20×4= ×4= 100×= ×20= ×5=42×3= ×0= 3×= ×40= ×20=口算 ×3= ×40= ×10= 4×= ×2=×4= ×4= ×40= 10×= ×6=×7= ×4= 2×= ×4= ×5=×3= ×8= 3×= ×7= ×9= 口答它们的积有几位小数 ×= ×= ×= ×= ×=×= ×= ×= ×=×=×3= ×=×= ×=×=口算 ×= ×8= ×2= ×= ×2×=4××= 7××0=××=+×5=计算 ×8= ×17= ×5= ×2= 3××7=×= ×= ×4= ×8= 5×4×=×= ×10= ×= ×7= 8××5=××=×+××= += ×2= ×= ×=×= -= ×= ×7= ×70=×5= += ×= ×= ×=×5= -= 90×= ×= ×=计算 ×= 43×= ×7= ×= ×=×= ×5= ×= ×= ×=×= ×= ×20= 65×= ×=×= ×4= ×= ×50= ×= 口算 -= ×= ×= ×200= ×=+= ×500= ×= ×3= 30×=×-×= ××= ×+×= ×= ×= ×= ×3= ×=×4= ×= ×100= 30×= ×2=20×+= +×8=×-×= ×=×= ×= ×= ×=×3= ×= ×30= ×0= ×=×4×=102×-2×=104×=×5口算 76÷2= 721÷7=÷10=×=×20= 60÷6= 905÷5=435÷100=×2=×100= 57÷3= 800÷40=÷100=64÷4=315÷1000= 口算 ×= ÷4= ÷9= ÷2= ÷4=70×= ÷4= ÷7= ÷6= ÷8=×6= ÷3= ÷8= ÷9= ÷3=×4= ÷5= ÷7= ÷3= 口算 ×4= += ÷2= ÷8= ÷3=×5= += ÷5= ÷9= ÷4=×5= -= ÷7= ÷4= ÷5=×6= -=