问题
解答题
计算下面各题(能简算的要简算)
|
答案
(1)1.2×0.8×1.25,
=1.2×(0.8×1.25),
=1.2×1,
=1.2;
(2)4.09÷2.5÷4,
=4.09÷(2.5×4),
=4.09÷10,
=0.409;
(3)1.43×7.5+7.57×7.5+7.5,
=7.5×(1.43+7.57+1),
=7.5×10,
=75.
计算下面各题(能简算的要简算)
|
(1)1.2×0.8×1.25,
=1.2×(0.8×1.25),
=1.2×1,
=1.2;
(2)4.09÷2.5÷4,
=4.09÷(2.5×4),
=4.09÷10,
=0.409;
(3)1.43×7.5+7.57×7.5+7.5,
=7.5×(1.43+7.57+1),
=7.5×10,
=75.