计算下列各题:(1)-48×(-16+34-112)(2)-8×(-2)4-(-12)2×(-2)4+49×(-3)2(3)4(2x2-xy)-(x2+xy-6)-数学

题目简介

计算下列各题:(1)-48×(-16+34-112)(2)-8×(-2)4-(-12)2×(-2)4+49×(-3)2(3)4(2x2-xy)-(x2+xy-6)-数学

题目详情

计算下列各题:
(1)-48×(-
1
6
+
3
4
-
1
12

(2)-8×(-2)4-(-
1
2
)
2
×(-2)4+
4
9
×(-3)2
(3)4(2x2-xy)-(x2+xy-6)
题型:解答题难度:中档来源:不详

答案

(1)原式=-48×(-class="stub"1
6
)-48×class="stub"3
4
-48×(-class="stub"1
12
)=8-36+4=-24;
(2)原式=-8×16-class="stub"1
4
×16+class="stub"4
9
×9=-128-4+4=-128;
(3)原式=8x2-4xy-x2-xy+6=7x2-5xy+6.

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