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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