摘要： 7-2= 8-6= 6-4= 4+4= 1+6= 4+3=
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=| 2.4÷3= | 5.2÷1.3= | 6.6÷0.3= |
| 6.3÷0.09= | 1.8÷2= | 7.2÷1.2= |
| 2.5÷0.5= | 1.5÷0.25= | 3.2÷4= |
| 5.6÷1.4= | 9.6÷3.2= | 0.64÷1.6= |
| 0.4×3= | 2.8×5= | 1.7×0.3= | 2.5×4= |
| 0.2×0.5= | 0.4×2.4= | 0.7×9= | 0.4×0.3= |
| 1.25×0.8= | 6×0.4= | 3×0.26= | 0.08×7= |
| 8×6= | 72+19= | 6÷1= | 180÷180= |
| 48÷8= | 45+37= | 4×7= | 550-550= |
| 500-370= | 25+75= | 55+88= | 3200-700= |
| 69+24= | 350-80= | 77+66= | 790+130= |
| 87-29= | 800-330= | 99+11= | 257-257= |
| 65+35= | 69÷8= | 92+46= | 46÷7= |
| 50÷6= | 0÷8= | 39÷9= | 93-39= |
| 86-68= | 1000-300= | 29+63= | 54-45= |
| 7×7= | 75÷9= | 81÷9= | 800-260= |
| 86×0= | 470-80= | 55÷7= | 38+52= |
| 250+630= | 77+33= | 380+70= | 500-490= |
| 66÷7= | 6÷6= | 95-68= | 0×9= |
| 27÷9= | 910-320= | 73+37= | 0÷9= |
| 680+220= | 550+260= | 25÷4= | 0+9= |
| 57-38= | 8×9= | 47÷8= | 126-126= |
| 42+42÷7= | 64÷8+70= | 500+320+80= | 60+60+60= |
| 8÷8×8= | 1300+700-1000= | 30-30÷6= | 165-50-50= |
| 273+35+65= | 120+395+80= | 90÷90×90= | 4000-3500+500= |
| 100-23-77= | 165+165-165= | 65-（40-25）= | 28÷7×6= |
| 800+683-600= | 45+36-45= | 5×8÷5= | （27+36）÷7= |
| 650-599+250= | 58+97-58= | 989-231+231= | 53-（48+5）= |
| 7×8×0×9+9×8= | 1+2+3+4+5+6+7+8+9= | 81-9-9-9-9-9-9= | 15+15+15+15+15+15= |
| 89+89-89+89-89= | 64-5×8-2×8= | 147+148+149+150+151+152+53= | 1+2+3+4+5+6…+94+95+96+97+98+99= |