用递等式计算.(能简算的要简算)(1)0.78×0.45+0.55×0.78(2)4.12×101-4.12(3)(5.36+5.64)÷2.2(4)0.265÷[(0.98+0.02)×0.5].
(1)0.78×0.45+0.55×0.78,
=0.78×(0.45+0.55),
=0.78×1,
=0.78;
(2)4.12×101-4.12,
=4.12×(101-1),
=4.12×100,
=412;
(3)(5.36+5.64)÷2.2,
=11÷2.2,
=5;
(4)0.265÷[(0.98+0.02)×0.5],
=0.265÷[1×0.5],
=0.265÷0.5,
=0.053.
=0.78×(0.45+0.55),
=0.78×1,
=0.78;
(2)4.12×101-4.12,
=4.12×(101-1),
=4.12×100,
=412;
(3)(5.36+5.64)÷2.2,
=11÷2.2,
=5;
(4)0.265÷[(0.98+0.02)×0.5],
=0.265÷[1×0.5],
=0.265÷0.5,
=0.053.
温馨提示:答案为网友推荐,仅供参考