
计算:(1)(-3)+6-(-1);(2)(?75)×15÷(?312);(3)(-2)3-3×[(-4)2÷8-(3-5)]-22
计算:(1)(-3)+6-(-1);(2)(?75)×15÷(?312);(3)(-2)3-3×[(-4)2÷8-(3-5)]-22....
计算:(1)(-3)+6-(-1);(2)(?75)×15÷(?312);(3)(-2)3-3×[(-4)2÷8-(3-5)]-22.
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(1)(-3)+6-(-1)
=-3+6+1
=4;
(2)(?
)×15÷(?3
)
=-
×15×(-
)
=6;
(3)(-2)3-3×[(-4)2÷8-(3-5)]-22
=-8-3×[16÷8-(-2)]-4
=-8-3×[2+2]-4
=-8-3×4-4
=-24.
=-3+6+1
=4;
(2)(?
7 |
5 |
1 |
2 |
=-
7 |
5 |
2 |
7 |
=6;
(3)(-2)3-3×[(-4)2÷8-(3-5)]-22
=-8-3×[16÷8-(-2)]-4
=-8-3×[2+2]-4
=-8-3×4-4
=-24.
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