计算:(1) 20-35+25-10(2)?64÷315×58(3)(512+23?34)×(?12)(4)?22×(?12)+8÷(?2)
计算:(1)20-35+25-10(2)?64÷315×58(3)(512+23?34)×(?12)(4)?22×(?12)+8÷(?2)2...
计算:(1) 20-35+25-10(2)?64÷315×58(3)(512+23?34)×(?12)(4)?22×(?12)+8÷(?2)2
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(1)20-35+25-10
=20+25+[(-35)+(-10)]
=45+(-45)
=0;
(2)?64÷3
×
=-64×
×
=-
;
(3)(
+
?
)×(?12)
=
×(-12)+
×(-12)-
×(-12)
=-5-8+9
=-4;
(4)?22×(?
)+8÷(?2)2
=-4×(-
)+8÷4
=2+2
=4.
=20+25+[(-35)+(-10)]
=45+(-45)
=0;
(2)?64÷3
| 1 |
| 5 |
| 5 |
| 8 |
=-64×
| 5 |
| 16 |
| 5 |
| 8 |
=-
| 25 |
| 2 |
(3)(
| 5 |
| 12 |
| 2 |
| 3 |
| 3 |
| 4 |
=
| 5 |
| 12 |
| 2 |
| 3 |
| 3 |
| 4 |
=-5-8+9
=-4;
(4)?22×(?
| 1 |
| 2 |
=-4×(-
| 1 |
| 2 |
=2+2
=4.
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