计算(能简便的用简便方法计算):(1)(-16)-[(-513)+(-323)+(+317)+(-217)];(2)1÷(1-12)÷(1-13)÷(1-14)÷(1-15)÷(1-16);(3)(-

题目简介

计算(能简便的用简便方法计算):(1)(-16)-[(-513)+(-323)+(+317)+(-217)];(2)1÷(1-12)÷(1-13)÷(1-14)÷(1-15)÷(1-16);(3)(-

题目详情

计算(能简便的用简便方法计算):
(1)(-16)-[(-5
1
3
)+(-3
2
3
)+(+3
1
7
)+(-2
1
7
)];
(2)1÷(1-
1
2
)÷(1-
1
3
)÷(1-
1
4
)÷(1-
1
5
)÷(1-
1
6
);
(3)(-
7
8
)÷(1
3
4
-
7
8
-
7
12
);
(4)
(-1)8×(-2)3-3×22÷[-1÷(-2)2]
0.25×22+[1-32×(-2)]

(5)(-98)×(-0.125)+(-98)×
1
8
-98×(-
4
7
).
题型:解答题难度:中档来源:不详

答案

(1)原式=-16-(-9+1)=-16+9-1=-8;
(2)原式=1×2×class="stub"3
2
×class="stub"4
3
×class="stub"5
4
×class="stub"6
5
=6;
(3)原式=-class="stub"7
8
÷(class="stub"42
24
-class="stub"21
24
-class="stub"14
24
)=-class="stub"7
8
×class="stub"24
7
=-3;
(4)原式=class="stub"-8+12×4
1+19
=2;
(5)原式=(-98)×(-0.125+class="stub"1
8
-class="stub"4
7
)=(-98)×(-class="stub"1
8
+class="stub"1
8
-class="stub"4
7
)=-98×(-class="stub"4
7
)=56.

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