问题
解答题
脱式计算.(能简算的要简算)
1.05×(3-0.9)÷6.3. |
答案
(1)
÷[(5 18
-7 8
)×2 3
]4 5
=
÷[5 18
×5 24
]4 5
=
÷5 18 1 6
=
×65 18
=5 3
(2)
×16 7
-5 8
÷2 7 8 5
=
×16 7
-5 8
×2 7 5 8
=(
-16 7
)×2 7 5 8
=2×5 8
=5 4
(3)1.05×(3-0.9)÷6.3
=1.05×2.1÷6.3
=1.05×(2.1÷6.3)
=1.05×1 3
=0.35