(1)15113÷14=(2)867-(2345+667)=(3)31.4+15.19+20.6+32.81=(4)957-349+249-827=(5)4413-2315-2315+4423=(6)

题目简介

(1)15113÷14=(2)867-(2345+667)=(3)31.4+15.19+20.6+32.81=(4)957-349+249-827=(5)4413-2315-2315+4423=(6)

题目详情

(1)15
1
13
÷14
=
(2)8
6
7
-(
23
45
+6
6
7
)
=
(3)31.4+15.19+20.6+32.81=
(4)9
5
7
-3
4
9
+2
4
9
-8
2
7
=
(5)44
1
3
-23
1
5
-23
1
5
+44
2
3
=
(6)(1
3
4
+2
2
3
+3
1
4
+1
1
3
)÷5
=
(7)9+19+199+1999=
(8)0.9+0.99+0.999+0.111=
题型:解答题难度:中档来源:不详

答案


(1)15class="stub"1
13
÷14

=(14+1class="stub"1
13
)×class="stub"1
14

=14×class="stub"1
14
+1class="stub"1
13
×class="stub"1
14

=1+class="stub"1
13

=1class="stub"1
13


(2)8class="stub"6
7
-(class="stub"23
45
+6class="stub"6
7
)

=8class="stub"6
7
-class="stub"23
45
-6class="stub"6
7

=8class="stub"6
7
-6class="stub"6
7
-class="stub"23
45

=2-class="stub"23
45

=1class="stub"22
45


(3)31.4+15.19+20.6+32.81,
=(31.4+20.6)+(15.19+32.81),
=52+48,
=100;

(4)9class="stub"5
7
-3class="stub"4
9
+2class="stub"4
9
-8class="stub"2
7

=(9class="stub"5
7
-8class="stub"2
7
)-(3class="stub"4
9
-2class="stub"4
9
),
=1class="stub"3
7
-1,
=class="stub"3
7


(5)44class="stub"1
3
-23class="stub"1
5
-23class="stub"1
5
+44class="stub"2
3

=(44class="stub"1
3
+44class="stub"2
3
)-(23class="stub"1
5
+23class="stub"1
5
),
=89-46class="stub"2
5

=42class="stub"3
5


(6)(1class="stub"3
4
+2class="stub"2
3
+3class="stub"1
4
+1class="stub"1
3
)÷5

=[(1class="stub"3
4
+3class="stub"1
4
)+(2class="stub"2
3
+1class="stub"1
3
)]÷5,
=[5+4]÷5,
=9÷5,
=1.8;

(7)9+19+199+1999,
=(1+1+1+6)+19+199+1999,
=(1+19)+(1+199)+(1+1999)+6,
=20+200+2000+6,
=2220+6,
=2226;

(8)0.9+0.99+0.999+0.111,
=0.9+0.99+0.999+(0.1+0.01+0.001),
=(0.9+0.1)+(0.99+0.01)+(0.999+0.001),
=1+1+1,
=3.

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