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3×1.5= 2.5×4= 0÷0.9= 4÷0.2=
0.56÷0.7= 0.24×5= 0.2×5= 2.1-0.87=
3.54-3.5= 3.4-1.5= 12÷0.6= 8×0.125=
0.7×11= 0.13+1.7= 3.15÷0.5= 0.9÷4.5=
0.2×0.3= 1.2+0.56= 3-1.7= 1÷0.25=
78÷1.3= 15÷0.3= 2.1+1.49= 6.24-1.5=
1.2×0.3= 6.3÷6.3= 1.6×0.2= 3.7-1.2=
4.58-3.5= 72.8÷8= 3.5×0.3= 0.25×100=
3.2-2= 0.51÷17= 5.3÷0.01= 1.03×3=
2.8+12= 3.5×2= 2.2×0.1= 1-0.25=
0.62-0.32= 6.3÷0.21= 1.7×10= 0.12×3=
0.45×2= 1.2÷0.3= 1÷2= 4.8×100=
0.25×8= 0.89÷8.9= 17.8+2.2= 0.8÷0.2=
5.79÷0.1= 0.35+0.65= 8.9-0.9= 9.2-9.2=
3.6÷0.4= 15.15÷15= 0.2×0.3×0.1= 1.34×4×2.5=
分析:根据小数的加减乘除及四则混合运算进行计算即可.
解答:
解:3×1.5=4.5 2.5×4=10 0÷0.9=0 4÷0.2=20
0.56÷0.7=0.8 0.24×5=1.2 0.2×5=1 2.1-0.87=1.23
3.54-3.5=0.04 3.4-1.5=1.9 12÷0.6=20 8×0.125=1
0.7×11=7.7 0.13+1.7=1.83 3.15÷0.5=6.3 0.9÷4.5=0.2
0.2×0.3=0.06 1.2+0.56=1.76 3-1.7=1.3 1÷0.25=4
78÷1.3=60 15÷0.3=50 2.1+1.49=3.59 6.24-1.5=4.74
1.2×0.3=0.36 6.3÷6.3=1 1.6×0.2=0.32 3.7-1.2=2.5
4.58-3.5=1.08 72.8÷8=9.1 3.5×0.3=1.05 0.25×100=25
3.2-2=1.2 0.51÷17=0.03 5.3÷0.01=530 1.03×3=3.09
2.8+12=14.8 3.5×2=7 2.2×0.1=0.22 1-0.25=0.75
0.62-0.32=0.3 6.3÷0.21=30 1.7×10=17 0.12×3=0.36
0.45×2=0.9 1.2÷0.3=4 1÷2=0.5 4.8×100=480
0.25×8=2 0.89÷8.9=0.1 17.8+2.2=20 0.8÷0.2=4
5.79÷0.1=57.9 0.35+0.65=1 8.9-0.9=8 9.2-9.2=0
3.6÷0.4=9 15.15÷15=1.01 0.2×0.3×0.1=0.006 1.34×4×2.5=13.4
点评:口算题目,要求快速准确,能用简便方法的要用简便方法.
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