一、 口算:0.1×208= 7.2÷36= 4.8÷16=1.3×50= 0.5×20= 0.81÷0.09=4.2÷4= 0.98÷7= 0.39÷1.3=2.5×40= 4.7×2= 0.4×0.5=二、 简算:0.46×7.5+0.46×2.5 8.6×0.24+0.86×7.6三、 计算题:1.1.08÷(3.94+34.3×0.2)-0.082.4.8×(11.03-15.6÷
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![一、 口算:0.1×208= 7.2÷36= 4.8÷16=1.3×50= 0.5×20= 0.81÷0.09=4.2÷4= 0.98÷7= 0.39÷1.3=2.5×40= 4.7×2= 0.4×0.5=二、 简算:0.46×7.5+0.46×2.5 8.6×0.24+0.86×7.6三、 计算题:1.1.08÷(3.94+34.3×0.2)-0.082.4.8×(11.03-15.6÷](/uploads/image/z/14677043-59-3.jpg?t=%E4%B8%80%E3%80%81+%E5%8F%A3%E7%AE%97%3A0.1%C3%97208%3D+7.2%C3%B736%3D+4.8%C3%B716%3D1.3%C3%9750%3D+0.5%C3%9720%3D+0.81%C3%B70.09%3D4.2%C3%B74%3D+0.98%C3%B77%3D+0.39%C3%B71.3%3D2.5%C3%9740%3D+4.7%C3%972%3D+0.4%C3%970.5%3D%E4%BA%8C%E3%80%81+%E7%AE%80%E7%AE%97%3A0.46%C3%977.5%EF%BC%8B0.46%C3%972.5+8.6%C3%970.24%2B0.86%C3%977.6%E4%B8%89%E3%80%81+%E8%AE%A1%E7%AE%97%E9%A2%98%3A1.1.08%C3%B7%283.94%EF%BC%8B34.3%C3%970.2%29%EF%BC%8D0.082.4.8%C3%97%2811.03%EF%BC%8D15.6%C3%B7)
一、 口算:0.1×208= 7.2÷36= 4.8÷16=1.3×50= 0.5×20= 0.81÷0.09=4.2÷4= 0.98÷7= 0.39÷1.3=2.5×40= 4.7×2= 0.4×0.5=二、 简算:0.46×7.5+0.46×2.5 8.6×0.24+0.86×7.6三、 计算题:1.1.08÷(3.94+34.3×0.2)-0.082.4.8×(11.03-15.6÷
一、 口算:
0.1×208= 7.2÷36= 4.8÷16=
1.3×50= 0.5×20= 0.81÷0.09=
4.2÷4= 0.98÷7= 0.39÷1.3=
2.5×40= 4.7×2= 0.4×0.5=
二、 简算:
0.46×7.5+0.46×2.5 8.6×0.24+0.86×7.6
三、 计算题:
1.1.08÷(3.94+34.3×0.2)-0.08
2.4.8×(11.03-15.6÷7.5)
一、 口算:0.1×208= 7.2÷36= 4.8÷16=1.3×50= 0.5×20= 0.81÷0.09=4.2÷4= 0.98÷7= 0.39÷1.3=2.5×40= 4.7×2= 0.4×0.5=二、 简算:0.46×7.5+0.46×2.5 8.6×0.24+0.86×7.6三、 计算题:1.1.08÷(3.94+34.3×0.2)-0.082.4.8×(11.03-15.6÷
一、 口算:
0.1×208= 20.8 7.2÷36=20 4.8÷16=30
1.3×50= 65 0.5×20= 10 0.81÷0.09=9
4.2÷4= 1.05 0.98÷7= 0.14 0.39÷1.3= 0.3
2.5×40= 100 4.7×2=9.4 0.4×0.5=0.2
二、 简算:
0.46×7.5+0.46×2.5
=0.46×(7.5+2.5)
=0.46×10
=4.6
8.6×0.24+0.86×7.6
=8.6×0.24+8.6×0.76
=8.6×(0.24+0.76)
=8.6×1
=8.6
三、 计算题:
1.1.08÷(3.94+34.3×0.2)-0.08
=1.08÷(3.94+6.86)-0.08
=1.08÷10.8-0.08
=0.1 -0.08
=0.02
2.4.8×(11.03-15.6÷7.5)
=4.8×(11.03- 2.08)
=4.8×8.95
=42.96
一由上到下由左到右依次为:20.8 0.2 0.3 65 10 9 1.05 0.14 0.3 100 9.4 0.2
二0.46*7.5+0.46*2.5=0.46*10=4.6
8.6*0.24+0.86*7.6=8.6*1=8.6
0.1×208=20.8 7.2÷36=0.5 4.8÷16=0.3
1.3×50=65 0.5×20=10 0.81÷0.09=9
4.2÷4=1.05 0.98÷7=0.14 0.39÷1.3=0.3
2.5×40=100 4...
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0.1×208=20.8 7.2÷36=0.5 4.8÷16=0.3
1.3×50=65 0.5×20=10 0.81÷0.09=9
4.2÷4=1.05 0.98÷7=0.14 0.39÷1.3=0.3
2.5×40=100 4.7×2=9.4 0.4×0.5=0.2
二、 简算:
0.46×7.5+0.46×2.5 8.6×0.24+0.86×7.6
=0.46×(7.5+2.5) =0.86×2.4+0.86×7.6
=0.46×10 =0.86×(2.4+7.6)
=4.6 =0.86×10
=8.6
三、 计算题:
1. 1.08÷(3.94+34.3×0.2)-0.08
=1.08÷(3.94+6.86)-0.08
=1.08÷10.8-0.8
=0.1-0.08
=0.02
2. 4.8×(11.03-15.6÷7.5)
=4.8×(11.03-2.08)
=4.8×8.95
=42.96
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