小学数学计算题专题六 混合运算综合练习最新整理.docx
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小学数学计算题专题六混合运算综合练习最新整理
混合运算综合练习
【知识讲解】
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%=
329+276=8--=÷=
÷×=2÷-÷2=×16-2÷=
0.7+0.35+0.6÷2=1.2×5÷=
777+777-777×777÷777=
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
8.36×75%+63×+0.75
9.[120%—(65%-0.35)]÷
10.79÷150-29×
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),
18.6.4+3.6÷[(﹣3.5)×],
19.[2+(5.4﹣3)×1]÷3
20.
21.
22.
23.[(+0.1÷2)×+1÷(+)]÷0.01
24.26+10.5×÷8﹣(26﹣1.6÷×2)
25.15÷〔(﹣)÷〕﹣0.5,
26.(2.5×)÷(×1.8)-0.75÷
27.9.8110%+98.1+0.049981
28.8.25+[2.85﹣(3﹣10.8×)÷1]
29.
30.×(4.85÷﹣3.6+6.15×3)+[5.5﹣175×(1+)]
31.
参考答案:
一、【答案】10015201000
1487114
0.16057101.357.27775
二、【答案】
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.
8.36×75%+63×+0.75
=36×0.75+63×0.75+0.75×1
=(36+63+1)×0.75
=100×0.75
=75
9.[120%—(65%-0.35)]÷
=[1.2—0.3]÷
=0.9÷
=12
10.79÷150-29×
=79×-29×
=(79-29)×
=50×
=
11.14÷[(+)×]
=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,
=13680﹣12750,
=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
=÷0.01
=;
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.
26.(2.5×)÷(×0.8)-0.75÷
=2÷0.2-×
=10-10
=0
27.9.8110%+98.1+0.049981
=9.81×0.1+×10×9.81+0.049×1009.81
=9.81×0.1+5×9.81+4.99.81
=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÷30
=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﹣)
=