通用小学数学计算题专题六 混合运算综合练习
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这是一份通用小学数学计算题专题六 混合运算综合练习,共14页。
1. 在四则运算里,加法和减法称为第一级运算,乘法和除法称为第二级运算。
2. 同一级运算:从左往右计算
没有括号的
两级运算:先算乘除,再算加减
有括号的:先算括号里面的,再算括号外面的
【巩固练习】
一、直接写得数。
2.8×25+12×2.5= ( - )×30= ×25=
12.5×32×2.5= 1﹣ + = 1÷ × =
0.5﹣ +0.5﹣ = ( + )×24= 7÷ ×7÷ =
﹣ × = 10﹣3.2﹣5.8= × =
1÷5× = 12×( + )= 1.01﹣91%=
11 9 16 2
329+276= 8- - = ÷ =
20 20 9 3
1 6 9 2 2 5 7
÷ × = 2÷ - ÷2= ×16-2÷ =
3 5 10 3 3 7 5
5
0.7+0.35+0.6÷2= 1.2×5÷ =
6
3 5 1 1 1 1
777+777-777×777÷777= 6
8 8 2 2 2 2
二、脱式计算。
1. ( + )×2. ( + )÷ ﹣
3. × + ÷ ﹣ ×60%
4. +( ﹣ )×
5. 0.6÷[0.06×(9.85+15%)]
6. 12﹣12÷12%×0.01
7. 1÷ +4×0.75
3
8. 36×75%+63× +0.75
4
9. [120%—(65%-0.35 )]÷
3
40
1
10. 79 ÷ 150 -29 ×
150
11. 14÷[( + )× ]
12. (15.04﹣6.4)÷ +110.2
13. 4.71÷[( ﹣ )× ]
14. [ ×( 0.25)]÷0.5
15. 304×45﹣4080÷24×75,16. ﹣4.28×(0.375﹣ ),
17.( ﹣ × )÷( +2.5),
]
]
20.
21.
22.23.[( +0.1÷2)× +1÷( + )]÷0.01
24. 26+10.5× ÷8 ﹣(26﹣1.6÷ ×2 )
25. 15÷〔( ﹣ )÷ 〕﹣0.5,
27. 9.81 10%+ 98.1+0.049 981
]4 1
26.(2.5× )÷( ×1.8)-0.75÷
5 4
3
40
]
30. ×(4.85÷ ﹣3.6+6.15×3 )+[5.5﹣175×(1 + )]
31.
参考答案:
14 87
1 14
二、【答案】6
一、【答案】100 15 20 1000 5
4
9
0.1
2 1 2
605 7 2 2 10 1.35
3 4 3
7.2 777 5
1
4
1. ( + )×
= × + ×
= +
= ;
2. ( + )÷ ﹣
= ÷ ﹣
= ;
3. × + ÷ ﹣ ×60%
= × + × ﹣ ×
= ×( + ﹣ )
= ×1
= ;
4. +( ﹣ )×
= +( × ﹣ × )
= +( ﹣ )
=( + )﹣
=2﹣
= ;
5. 0.6÷[0.06×(9.85+15%)]
=0.6÷[0.06×10]
=0.6÷0.6
=1;6. 12﹣12÷12%×0.01
=12﹣100×0.01
=12﹣1
=11;
7. 1÷ +4×0.75
=10+3
=13.
3
8. 36×75%+63× +0.75
4
=36×0.75+63×0.75+0.75×1
=(36+63+1)×0.75
=100×0.75
=75
=12
1
10. 79 ÷ 150 -29 ×
150 1 1
= 79× -29 ×
150 150
1
=(79-29)×
150 1
=50×
150 1
=
3
11. 14÷ [( + )× ]9. [120%—(65%-0.35 )]÷
3
40
=[1.2—0.3] ÷
3
40
=0.9÷
3
40
=14÷[ × ]
=14÷
=14×
=36
12.(15.04﹣6.4)÷ +110.2
=8.64× +110.2
=10.8+110.2
=121
13. 4.71÷[( ﹣ )× ]
=4.71÷[ × ]
=4.71÷
=14.13;
14. [ ×( 0.25)]÷0.5
=[ ×0.35]÷0.5
=0.2÷0.5
=0.4.
15. 304×45﹣4080÷24×75,
=13680﹣170×75,
]
=930;
16. ﹣4.28×(0.375﹣ ),
=7.2﹣4.28×( ﹣ ),=7.2﹣4.28× ,
=7.2﹣1.07,
=6.13;
17. ( ﹣ × )÷( +2.5),
=( ﹣ )÷( + ),
= ÷ ,
= × ,
= ;
18. 6.4+3.6÷[( ﹣3.5)× ],
=6.4+3.6÷[( ﹣ )× ],
=6.4+3.6÷[ × ],
=6.4+3.6÷6
=6.4+0.6
=7
19. [2 +(5.4﹣3 )×1 ]÷3
=[2 + × ]÷3
=[2 + ]÷3
= ×
= ;
20.=
=
=
=
=
21. 1 ×17.6+36÷ +2.64×12.5
= ×17.6+36× +26.4×
= ×(17.6+36+26.4)
= ×80
=100
22.
=
=
=
=
=2
23.[( +0.1÷2)× +1÷( + )]÷0.01=[( +0.05)× +1÷ ]÷0.01
=[0.3× + ]÷0.01
=[ + ]÷0.01
27
= 26 ÷0.01
1350
= 13 ;
24. 26+10.5× ÷8 ﹣(26﹣1.6÷ ×2 )
=26+8.4÷8 ﹣(26﹣10×2 )
=26+1﹣(26﹣25)
=27﹣1
=26.
25. 15÷〔( ﹣ )÷ 〕﹣0.5,
=15÷[( ﹣ )× ]﹣0.5,
=15÷[ × ﹣ × ]﹣0.5,
=15÷[ ]﹣0.5,
=15÷2﹣0.5,
=7.5﹣0.5,
=7.
=10-10
=04 1
26.(2.5× )÷( ×0.8)-0.75÷
5 4
3 40
=2÷0.2- ×
4 3
3
40
27. 9.81 10%+ 98.1+0.049 981
=9.81×0.1+ ×10×9.81+0.049×100 9.81
=9.81×0.1+5×9.81+4.9 9.81
=9.81×(0.1+5+4.9)
=9.81×10
=98.1
28. 8.25+[2.85﹣(3 ﹣10.8× )÷1 ]
=8.25+[2.85﹣(3.4﹣2.4)× ]
=8.25+[ ﹣ ]
= +
=
29.
=( )÷( )
=(48﹣18)÷30
=30÷3 0
=1
30. ×(4.85÷ ﹣3.6+6.15×3 )+[5.5﹣1.75×(1 + )]
= ×(4.85×3.6﹣3.6+6.15×3.6)+( )
= ×3.6×(4.85﹣1+6.15)+( )
=0.9×10+1
=9+1=10
31.
=(1 )+(1﹣ )+(1﹣ )+…+(1﹣ )
=1﹣ +1﹣ +1﹣ +…+1﹣
=(1×8)﹣( )
=8﹣(1﹣ + ﹣ + ﹣ +…+ ﹣ )
=8﹣(1﹣ )
=
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