来自董新民的问题
9.8×65.2×1.25-12.5×0.652×18.
9.8×65.2×1.25-12.5×0.652×18.
1回答
2020-04-08 00:19
9.8×65.2×1.25-12.5×0.652×18.
9.8×65.2×1.25-12.5×0.652×18.
9.8×65.2×1.25-12.5×0.652×18
=9.8×65.2×1.25-1.25×65.2×1.8,
=65.2×1.25×(9.8-1.8),
=65.2×1.25×8,
=65.2×(1.25×8)
=65.2×10,
=652.