2÷0.2= 2.5×4 0.25+4= 1.87×0= 3.5+0.5= 1.2÷0.4= 3.6÷4= 0÷1.25= 0.12×6= 0.64×0.03= 5.8+4.2-6.5= 7.8÷3= 0.125×8= 2.8÷1.4= 0.25÷0.5= 7.21÷7= 0.35÷10= 3.6÷3= 6.3÷0.9= 0.54÷6= 0.3×0. 1= 1.3÷2= 0.4÷8= 27.3÷3= 0.51÷0.3= 15÷0.01= 5÷10= 0.7×12= 0.2×0. 5= 3.8×0. 1= 0.2×0.2= 0.04×0.4= 12.4+7.6= 8×0.5= 0.72÷36= 9×2.5+2.5= 1.8÷3= 2.3÷2= 6.5÷5= 2.14÷2= 2.5×4= 2.7×2= 0.5×7= 4.8+3.6+5.2= 3.4÷1.7= 2.5+0.2= 4.5÷5= 5+2.8= 0.8×0.3= 13.5×2×0= 5.25÷5= 4×2.2= 0.12×0.5= 1.8×5= 6.24÷2= 2.83-1.43= 1.2+2.9= 3.8÷2= 1.32×3= 4.6×7= 查看更多

 

题目列表(包括答案和解析)

口算
1.2÷0.2=
2.5×4=0.25+4=1.87×0=
3.5+0.5=1.2÷0.4=3.6÷4=0÷1.25=
0.12×6=0.64×0.03=5.8+4.2-6.5=7.8÷3=
0.125×8=2.8÷1.4=0.25÷0.5=7.21÷7=
0.35÷10=3.6÷3=6.3÷0.9=0.54÷6=
0.3×0.1=1.3÷2=0.4÷8=27.3÷3=
0.51÷0.3=15÷0.01=5÷10=0.7×12=
0.2×0.5=3.8×0.1=0.2×0.2=0.04×0.4=
12.4+7.6=8×0.5=0.72÷36=9×2.5+2.5=
1.8÷3=2.3÷2=6.5÷5=2.14÷2=
2.5×4=2.7×2=0.5×7=4.8+3.6+5.2=
3.4÷1.7=2.5+0.2=4.5÷5=5+2.8=
0.8×0.3=13.5×2×0=5.25÷5=4×2.2=
0.12×0.5=1.8×5=6.24÷2=2.83-1.43=
1.2+2.9=3.8÷2=1.32×3=4.6×7=

查看答案和解析>>

6.8-1.36-0.64 21.9+(15.7+18.1) (2.5×73)×0.4 ★9×(7000÷63)
5.6×1.25 ★11.1÷0.25 457÷25÷4 2.6+7.7+7.4+3.3
0.2×1.8×0.5×10 ★21÷1.25 ★(8700+870+87)÷87 5.3×4.9+5×5.3.

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822-199=1.87+5.3=7÷1.4=0.18×10=
数学公式÷4=1-数学公式=数学公式+数学公式=2.5×0.4=
数学公式×数学公式=36×25%=

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口算。
3.5+4.5= 7.81+0.2=
8.7+2.15= 69.4-18.1=
25.4-11.1= 27.1+0.25=
78.5+25.1= 93.7-13.7=
28+15.4= 29.1+19.2=
30.87-30.07= 0.28+1.2=
12.5+3.5= 9.08-0.08=
29.4-19.1= 78.5+15.5=
45-1.7= 29+45.1=

查看答案和解析>>

(1)
3÷2+5÷2=
(3+5)÷2=

4.8÷6+7.2÷6=
(4.8+7.2)÷6=

3.6÷0.3+8.4÷0.3=
(3.6+8.4)÷0.3=

我发现的规律用字母表示是:a÷c+b÷c=
(a+b)÷c
(a+b)÷c

(2)
12.5÷2×0.8=
12.5×0.8÷2=

25÷8×40
25×40÷8

7÷2.8×0.4=
7×0.4÷2.8=

我发现的规律用字母表示是:a÷b×c=
a×c÷b
a×c÷b

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