湘教版七年级上册数学第1章1.7有理数的混合运算学法大视野答案(2)
7课堂探究例2变式训练2-2答案
解:(1)(7/9-5/6+3/18)÷1/18-1.5×6
=(7/9-5/6+3/18)×18-9
=7/9×18-5/6×18+3/18×18-9
=14-15+3-9
=-7
(2)(-0.25)2÷(-1/2)4+(
=(-1/4)2÷1/16+11/8×24-15/4×24
=1/16×16+33-90
=1+33-90
=-56
8课堂训练第1~2题答案
D;A
9课堂训练第3题答案
(1)0
(2)-54
10课堂训练第4题答案
5
11课堂训练第5题答案
解:(1)原式=-49+2×9+(-6)÷1/9
=-49+18+(-54)
=-85
(2)原式=1-1/2×(3×4/9-1)+1/4×(-8)
=1-1/2×1/3+(-2)
=1-1/6+(-2)
=
12课后提升选择题答案
1 | 2 | 3 | 4 | 5 |
A | A | B | D | B |