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五、有理数混合运算
(-1?6
320?45?712)×(-15×4) ??7183??7?(-2.4)
3422÷(-7)×7÷(-51) [151-(11÷15+31]÷(-11) 72428
153121×(-5)÷(-1)×5 -(1-21+14-7)÷(-42) 53
52-13×2-0.34×7+1×(-13)-7×0.34 8-(-25)÷(-5) 33
11111(-13)×(-134)×13×(-67) (-478)-(-52)+(-44)-38
5
2(-16-50+3)÷(-2) (-0.5)-(-31)+6.75-51 5
178-87.21+4321921+5321-12.79
-27-(-12)+|-112|
[(-958114)-17+21]÷(-42)
-13755×(32-16)÷212
42(-6)×(-4)+(-32)÷(-8)-3 (-9)×(-4)+ (-60)÷12 -|-3|÷10-(-15)×13 (21-3117132+118)÷(-16)×(-7)6
-×3 -2-
2
22??1?3 34-43 ?13-2×??1?3 ??3?2÷??4?2
?2
×
??2?2
?322 +
??4?3 ??2?3×??2?4×??2?5 ?2×32-??2?3?2
??2?2
?2+
??2?3+23 ?22-(?3)3×??1?3-??1?3 -????1??2+??1?2 22
0-??3?
22221???????3??2×(-+1) ×0 6+× -10+8÷-4×3 23542÷×
3??2?3
?22×
23321212??÷ -×-÷???2???0.8??1??? 3??232
-1-
5???0.4????2.5??5 ??1?25-(1-0.5)×
13
233??2?3×??2??? ?×32 7
?4×??3?2+6 ??1213×3×
87222 -7+2×??3?+(-6)÷??1? ??2?12×??1?33
??2?4÷(-8)-??12?3×(-22)
??2?2-2[??1?2-3×3]÷1245
-
{??3?3???1???3?0.4???1??(?2)??2?}??
-4×
??1?7??6?3+
???5?3?3????2?3
???5?2?42???3?2?×(758?11)×
??7?4??6?2÷9÷??6?9?2 36×?112?3?2 -14+(1-0.5)×123×[2×??3?]
-33-
?8???2?3?1?+??3?2×
??2?3÷
10.25
8
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