来自唐立平的问题
(1)125×3.2(2)4×6.2×2.5(3)12.8×9.9(4)10.1×4.8-0.48(5)24÷16(6)15-3.8-6.2
(1)125×3.2(2)4×6.2×2.5(3)12.8×9.9(4)10.1×4.8-0.48(5)24÷16(6)15-3.8-6.2
1回答
2020-04-09 20:10
(1)125×3.2(2)4×6.2×2.5(3)12.8×9.9(4)10.1×4.8-0.48(5)24÷16(6)15-3.8-6.2
(1)125×3.2(2)4×6.2×2.5(3)12.8×9.9(4)10.1×4.8-0.48(5)24÷16(6)15-3.8-6.2
(1)125×3.2,
=125×8×0.4,
=1000×0.4,
=400;
(2)4×6.2×2.5,
=4×2.5×6.2,
=10×6.2,
=62;
(3)12.8×9.9,
=12.8×(10-0.1),
=128-1.28,
=126.72;
(4)10.1×4.8-0.48,
=101×0.48-0.48,
=(101-1)×0.48,
=100×0.48,
=48;
(5)24÷16,
=24÷(4×4)
=24÷4÷4,
=6÷4,
=1.5;
(6)15-3.8-6.2,
=15-(3.8+6.2),
=15-10,
=5.