递等式计算(能简算的要简算) 1、1.2×(9.6÷2.4)÷4.8 2、8.9×1.1×4.7 3、3.94+34.3×0.2
问题描述:
递等式计算(能简算的要简算) 1、1.2×(9.6÷2.4)÷4.8 2、8.9×1.1×4.7 3、3.94+34.3×0.2
答
(1)1.2×(9.6÷2.4)÷4.8
=1.2÷2.4×9.6÷4.8
=1/2 ×2
=1
(2)8.9×1.1×4.73
=8.9×5.203
=(10-1.1)×5.203
=52.03-5.7233
=46.3067
(3)3.94+34.3×0.2
=3.94+6,86
=10.8