用简便方法计算,写出必要的计算过程.8.56×2.7+1.44×2.7 1.25×2.5×4×0.8 5.74×99+5.74 72×0.03+0.3×2.8.
(1)8.56×2.7+1.44×2.7
=(8.56+1.44)×2.7
=10×2.7
=27;
(2)1.25×2.5×4×0.8
=(1.25×8)×(2.5×4)
=10×10
=100;
(3)5.74×99+5.74
=5.74×(99+1)
=5.74×100
=574;
(4)72×0.03+0.3×2.8
=7.2×0.3+0.3×2.8
=(7.2+2.8)×0.3
=10×0.3
=30.
=(8.56+1.44)×2.7
=10×2.7
=27;
(2)1.25×2.5×4×0.8
=(1.25×8)×(2.5×4)
=10×10
=100;
(3)5.74×99+5.74
=5.74×(99+1)
=5.74×100
=574;
(4)72×0.03+0.3×2.8
=7.2×0.3+0.3×2.8
=(7.2+2.8)×0.3
=10×0.3
=30.
温馨提示:答案为网友推荐,仅供参考