摘要：8+6= 3+6= 9-0= 6+3+5= 12-9= 15-7= 11-4= 5+9-7= 7+5= 5+8= 8+9= 11-6+8= 14-5= 18-9= 13-6= 16-9-6= 9+9= 9+8= 6+9= 7+0=
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| 8+6= | 3+6= | 9-0= | 6+3+5= |
| 12-9= | 15-7= | 11-4= | 5+9-7= |
| 7+5= | 5+8= | 8+9= | 11-6+8= |
| 14-5= | 18-9= | 13-6= | 16-9-6= |
| 9+9= | 9+8= | 6+9= | 7+0= |
①75×298+75×3-75×1
②
+
+
+
+
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+
③2012÷2012
+
④
+
+
+
⑤(8+
+
+
)×(
+
+
+
)-(8+
+
+
+
)×(
+
+
)
⑥9%x-4.5×0.2=1.8
⑦
x-5%x=17.5．
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②
| 1 |
| 1×2 |
| 1 |
| 2×3 |
| 1 |
| 3×4 |
| 1 |
| 4×5 |
| 1 |
| 5×6 |
| 1 |
| 6×7 |
| 1 |
| 7×8 |
③2012÷2012
| 2012 |
| 2013 |
| 1 |
| 2014 |
④
| 1 |
| 23 |
| 202 |
| 2323 |
| 50505 |
| 232323 |
| 15151515 |
| 23232323 |
⑤(8+
| 1 |
| 5 |
| 1 |
| 6 |
| 1 |
| 7 |
| 1 |
| 5 |
| 1 |
| 6 |
| 1 |
| 7 |
| 1 |
| 8 |
| 1 |
| 5 |
| 1 |
| 6 |
| 1 |
| 7 |
| 1 |
| 8 |
| 1 |
| 5 |
| 1 |
| 6 |
| 1 |
| 7 |
⑥9%x-4.5×0.2=1.8
⑦
| 3 |
| 4 |
| 3.3×2= | 2.4×0.5= | 0.6×0.9= | 0.2×0.3= |
| 0.39+0.61= | 10-7.2= | 0.88+1.1= | 0.75×4= |
| 11-1.5= | 4.48-4= | 7.8-0.8= | 2.8×5= |
| 4×0.3= | 4×0.25= | 3.2+1.6= | 10.6-5.2= |
| 0.32+1.68= | 8×125= | 7.28+7= | 0.8+39.2= |
| 43+0.01= | 0.4×2= | 1.5×6= | 1×0.04= |
| 1.53-0.5= | 1.5-0.6= | 0.3+1.5= | 95÷5= |
| 0.65+4.35= | 14-7.4= | 11.2-9.8= | 4.4×2= |
| 35-25= | 56-26= | 45+15= | 35-15= |
| 38+28= | 15+25= | 12+12= | 47-27= |
| 13+23= | 1-12= | 14+14= | 212+312= |
| 14-0= | 610-510= | 1-23= | 0+56= |
| 78-38= | 29+29= | 58-48= | 15+45= |
| 0.9×125×8= | 5.75+1.37+4.25= | 0.43×10+5.7= | 62-2.8-1.2= |
| 2.7×4+2.7×6= | 0.25×0.5×4= |
把自然数（0除外）按下表排列成A，B，C三行，1000是在
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C
C
行．| A | 1，6，7，12，13，18，19… |
| B | 2，5，8，11，14，17，20… |
| C | 3，4，9，10，15，16，21… |
| 3.3×2= | 2.4×0.5= | 0.6×0.9= | 0.2×0.3= |
| 0.39+0.61= | 10-7.2= | 0.88+1.1= | 0.75×4= |
| 11-1.5= | 4.48-4= | 7.8-0.8= | 2.8×5= |
| 4×0.3= | 4×0.25= | 3.2+1.6= | 10.6-5.2= |
| 0.32+1.68= | 8×125= | 7.28+7= | 0.8+39.2= |
| 43+0.01= | 0.4×2= | 1.5×6= | 1×0.04= |
| 1.53-0.5= | 1.5-0.6= | 0.3+1.5= | 95÷5= |
| 0.65+4.35= | 14-7.4= | 11.2-9.8= | 4.4×2= |
| 35-25= | 56-26= | 45+15= | 35-15= |
| 38+28= | 15+25= | 12+12= | 47-27= |
| 13+23= | 1-12= | 14+14= | 212+312= |
| 14-0= | 610-510= | 1-23= | 0+56= |
| 78-38= | 29+29= | 58-48= | 15+45= |
| 0.9×125×8= | 5.75+1.37+4.25= | 0.43×10+5.7= | 62-2.8-1.2= |
| 2.7×4+2.7×6= | 0.25×0.5×4= |