6×5=6×4+=6×6-. 题目和参考答案——青夏教育精英家教网—

0.7+0.9= 1.6 1.6	0.125×80= 10 10	8.24+3.76= 12 12	62.5×80= 5000 5000
4.1-3.8= 0.3 0.3	0.32÷16= 0.02 0.02	14+0.78= 14.78 14.78	6.4÷16= 0.4 0.4
14.6-0.34= 14.26 14.26	5÷10= 0.5 0.5	1.3+8.56= 9.86 9.86	0.7-0.55= 0.15 0.15
2.4×5= 10 10	1-0.03= 0.97 0.97	8.1÷3= 2.7 2.7	3.6÷12= 0.3 0.3
250×0.04= 10 10	30.5+3.05= 33.55 33.55	3.75×400= 1500 1500	0.78+2.2= 2.98 2.98
1.5×8= 12 12	6×1.5= 9 9	25×0.04= 1 1	9.6÷16= 0.6 0.6
5-0.08= 4.92 4.92	3.25+0.75= 4 4	10-0.1= 9.9 9.9	0.17×4= 0.68 0.68
7.4÷2= 3.7 3.7	0.16÷8= 0.02 0.02 ．

口算我最行．

0.25×2=	89.3×0.6=	5÷0.25=	6.5×6.7+3.5×6.7=
9.6÷32=	65÷1.3=	0.28÷4=	50×7.89×0.2=
1÷4=	28÷0.02=	28÷0.5=	0.4×3.2×2.5=

递等式计算，写出必要的计算过程，能简便计算的用简便方法计算：
（1）999+2+99+9+9 999+2
（2）6.9×4+310÷25
（3）（3.5+6.5-6.5+3.5）÷4×2.5
（4）（8.6×3.4+3.4×3.4）×2.5
（5）4.8+（1.6÷4+1.2）÷5
（6）6.25÷[（17.2-9×1.8）÷0.016]．

4.7+2.3=	4.5×2=	6.9-2.5=	7.2×0.8=
6×3.4=	0.62-0.32=	1.4×0.5=	0.75×100=
0.02×0.5=	3.6÷0.3=	6.3÷7=	5.6÷100=
0.75÷0.25=	0.125×8=	4.8÷0.3=	0.96÷2=
0.56÷28=	0.36÷0.4=	0.64÷0.8=	0.72÷3.6=
3.6÷24=	0.8×1.1=	7.2+12.8=	46.7-3.8=
12.8÷4=	5.2÷13=	12.5÷5=	1.64÷41=
10÷20=	24÷15=	8.65×10=	0.35×0.6=
3.08×0.01=	4.95×1000=	6.9×0.1=	0.4×0.5=
2.4÷0.8=	10.8÷9=	9.6÷0.8=	0.108÷2=
4.95÷0.9=	9.65÷0.1=	0.325×100=	2.5×8=
0.56÷0.7=	0.125×4=	3.28×0.1=	3.9÷0.13=
7.2×0.1=	0.01×0.1=	0.25×0.4=	1.6÷0.8=
1÷2.5=	1.25×0.8=	3.2÷0.04=	0÷1.7=
0.22×102=	9.6÷0.8=	5×0.24=	4.5-0.05=
3.9÷0.13	16.5÷0.5=	5×0.12=	24×0.5=
4.8×0.5=	2.8+4.2=	0.84÷2.1=	5÷0.25=
7.8÷0.01=	5.4÷0.6=	3.2÷5=	7×0.62=
0.56÷0.8=	7.4-2.8=	0.18÷0.2=	0.16÷8=
4.5×0.02=	8+7.2=	1.2×30=	0.012×0.2=
7.3×0.3=	9÷6=	3.6÷0.12=	7.8÷0.6=
2÷5=	4.5+5=	0.3÷0.6=	0.96÷0.2=
10.5×0.4=	7.3+0.27=	8×0.125=	0.54÷0.6=
0.61+0.39=	0.56÷28=	10÷20=	4.08÷0.4=
11-9.4=	0.8×0.11=	0.72+12.8=	5.6÷0.01=
2.3×100=	0.75×100=	0.108÷2=	10.8÷9=
0.7÷0.8=	16-5.07=	4.2×0.4=	0.72×6=
12÷0.5=	5.2×0.4=	12.2÷0.2=	5.6÷100=
0.41+3.7=	0.02×0.5=	7.2-0.8=	1.4×0.5=
84÷0.21=	0.75÷0.25=	2.5×16=	0.108÷2=
1.75+32.5=	16-5.07=	5.2÷13=	1.64÷41=
1.02×0.2=	0.26×0.3=	8.4×0.02=	1.29×6=
0.8×0.05=	12.6÷0.03=	8.71÷0.1=	21÷0.21=
0.8×0.13=	0.34÷17=	8.08÷0.4=	0.5×2.2=
1.24÷4=	3.27+0.63=	5.02×0.3=	0.3×0.5=
6.4÷4=	7.2÷1.8=	0.7÷0.35=	0.72÷1.44=
0.48÷0.04=	1.25÷2.5=	5.5+55=	16.8÷8=
0.54+2.2=	3.5-0.05=	2÷0.02=	0.25×40=
1.5×0.6=	0.32÷0.8=	12.25÷0.5=	73.5×0.1=
46.5+52.5=	0.45×102=	1.25×88=	2.64+3.85+1.54=
8×1.25=	5.6÷3.5=	4.2÷0.7÷6=	0.4×8.6×25=
0.27÷0.3=	2.5×101=	0.65×101-0.65=	2.6×7÷2.6×7=

把1.6、6.4、2和0.5四个数组成比例

0.5：1.6=2：6.4（答案不唯一）

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