问题
解答题
简便运算:
32×1.25×2.5
4.4×5.8+5.6×5.8.
答案
(1)32×1.25×2.5,
=(8×1.25)×(2.5×4),
=10×10,
=100;
(2)4.4×5.8+5.6×5.8,
=(4.4+5.6)×5.8,
=10×5.8,
=58.
简便运算:
32×1.25×2.5
4.4×5.8+5.6×5.8.
(1)32×1.25×2.5,
=(8×1.25)×(2.5×4),
=10×10,
=100;
(2)4.4×5.8+5.6×5.8,
=(4.4+5.6)×5.8,
=10×5.8,
=58.