问题
解答题
脱式计算
1.95+0.65+2.15×1.4
(42.3-1.5+0.06)×0.66.
答案
(1)1.95+0.65+2.15×1.4,
=1.95+0.65+3.01,
=2.6+3.01,
=5.61;
(2)(42.3-1.5+0.06)×0.66,
=(40.8+0.06)×0.66,
=40.86×0.66,
=26.9676.
脱式计算
1.95+0.65+2.15×1.4
(42.3-1.5+0.06)×0.66.
(1)1.95+0.65+2.15×1.4,
=1.95+0.65+3.01,
=2.6+3.01,
=5.61;
(2)(42.3-1.5+0.06)×0.66,
=(40.8+0.06)×0.66,
=40.86×0.66,
=26.9676.