(1)计算:14-8.7-3.25+710.(2)计算:(-57)2×(-213)÷123.-数学

题目简介

(1)计算:14-8.7-3.25+710.(2)计算:(-57)2×(-213)÷123.-数学

题目详情

(1)计算:
1
4
-8.7-3.25+
7
10

(2)计算:(-
5
7
)2×(-2
1
3
)÷1
2
3
题型:解答题难度:中档来源:不详

答案

(1)原式=0.25-8.7-3.25+0.7=-8-3=-11;
(2)原式=class="stub"25
49
×(-class="stub"7
3
)×class="stub"3
5
=-class="stub"5
7

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