题目内容
【题目】用自己喜欢的方法进行脱式计算.
(1)4.28+(5.72﹣3.99)
(2)
+
÷6
(3)4.05﹣2.74﹣1.26
(4)98×0.9+9.8
(5)7﹣
×
﹣ ![]()
(6)
×[1÷(
+
)]
【答案】(1)解: 4.28+(5.72﹣3.99)
=(4.28+5.72)﹣3.99
=10﹣3.99
=6.01
(2)解:
+
÷6
=
+
× ![]()
=
+ ![]()
= ![]()
(3)解: 4.05﹣2.74﹣1.26
=4.05﹣(2.74+1.26)
=4.05﹣4
=0.05
(4)解: 98×0.9+9.8
=9.8×(9+1)
=9.8×10
=98
(5)解: 7﹣
×
﹣ ![]()
=7﹣
﹣ ![]()
=7﹣(
+
)
=7﹣1
=6
(6)解:
×[1÷(
+
)]
=
×[1÷
]
=
× ![]()
= ![]()
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