题目内容
脱式计算.
| (大h7-1大7)×7 | 大001-38大÷他 | 他30÷7÷3 | 178×3÷7. |
(d)(462-d42)×7,
=个d0×7,
=2d70;
(2)400d-个84÷6,
=400d-64,
=个9个7;
(个)6个0÷7÷个,
=90÷个,
=个0;
(4)d28×个÷2,
=个84÷2,
=d92.
=个d0×7,
=2d70;
(2)400d-个84÷6,
=400d-64,
=个9个7;
(个)6个0÷7÷个,
=90÷个,
=个0;
(4)d28×个÷2,
=个84÷2,
=d92.
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