直接写得数.①3451÷17×(323-299)=______②22.9×7.34+2.29×26.6=______③16711-(2213-1411)=______④48.48-231120+311

题目简介

直接写得数.①3451÷17×(323-299)=______②22.9×7.34+2.29×26.6=______③16711-(2213-1411)=______④48.48-231120+311

题目详情

直接写得数.
①3451÷17×(323-299)=______
②22.9×7.34+2.29×26.6=______
16
7
11
-(2
2
13
-1
4
11
)=______
④48.48-23
11
20
+31
13
25
-36.45=______
⑤〔1,9-1.9×(1
9
10
-1.9)〕÷3
4
5
=______.
题型:解答题难度:中档来源:不详

答案

①3451÷17×(323-299)
=3451÷17×24,
=203×24,
=4872;

②22.9×7.34+2.29×26.6
=2.29×73.4+2.29×26.6,
=(73.4+26.6)×2.29,
=100×2.29,
=229;

16class="stub"7
11
-(2class="stub"2
13
-1class="stub"4
11

=16class="stub"7
11
-2class="stub"2
13
+1class="stub"4
11

=16class="stub"7
11
+1class="stub"4
11
-2class="stub"2
13

=18-2class="stub"2
13

=15class="stub"1
3


④48.48-23class="stub"11
20
+31class="stub"13
25
-36.45
=48.48-23.55+31.52-36.45,
=48.48+31.52-(23.55+36.45),
=80-60,
=20.

⑤[1.9-1.9×(1class="stub"9
10
-1.9)]÷3class="stub"4
5

=[1.9-1.9×(1.9-1.9)]÷class="stub"19
5

=[1.9-1.9×0]×class="stub"5
19

=1.9×class="stub"5
19

=0.5.

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