问题
解答题
计算下面各题,能简算的要简算 13.25-5.34-7.66+4.75 6.48÷[(3.3-2.7)×0.9]
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答案
(1)13.25-5.34-7.66+4.75
=(13.25+4.75)-(5.34+7.66)
=18-13
=5
(2)6.48÷[(3.3-2.7)×0.9]
=6.48÷[0.6×0.9]
=6.48÷0.54
=12
(3)
×(10 13
+1÷3 4
)5 6
=
×(10 13
+3 4
)6 5
=
×10 13 39 20
=3 2
(4)
×7 8
+13 9
÷813 9
=
×7 8
+13 9
×13 9 1 8
=(
+7 8
)×1 8 13 9
=1×13 9
=13 9