2023-2024学年苏科版七年级数学上册《2.8有理数的混合运算》
同步计算能力达标测评(附答案)
(时间45分钟,共20小题,每小题6分,满分120分)
1.计算:
(1)5+(﹣6)+3﹣(﹣4);
(2)﹣23÷×(﹣)2.
2.计算:
(1);
(2).
3.计算:(1);
(2).
4.计算:
(1)﹣22﹣|﹣7|+3﹣2×;
(2)(﹣)2÷(﹣)2÷|﹣6|2÷(﹣)2.
5.计算:
(1)(﹣5)﹣(﹣6)+(﹣7)﹣(﹣4);
(2)(﹣1)2021+(﹣18)×|﹣|﹣4÷(﹣2).
6.计算:
(1);
(2).
7.计算
(1);
(2).
8.计算:
(1);
(2).
9.计算:
(1);
(2).
10.计算:
(1);
(2)(﹣1)2023+(﹣3)2×|﹣|﹣42÷(﹣2)4.
11.计算:
(1);
(2).
12.计算:﹣16÷(﹣2)3﹣22×|﹣|+(﹣1)2023.
13.计算;
(1)12﹣(﹣6)+(﹣9);
(2)﹣32÷(﹣2)2×|﹣1|×6+(﹣2)3.
14.计算:
(1);
(2).
15.计算
(1)﹣23﹣(1+0.5)×÷(﹣1);
(2)99÷(﹣)(进行简便运算).
16.计算:
(1)﹣2+1﹣(﹣5)﹣|﹣3|.
(2).
17.计算:
(1)﹣1﹣(1+0.5)×+(﹣4);
(2)﹣82+3×(﹣2)2+(﹣6)+(﹣)2.
18.计算:
(1)﹣66×4﹣(﹣2.5)÷(﹣0.1);
(2)﹣22÷×(﹣)2+[9﹣(﹣+)×36].
19.计算:
(1)﹣23÷()×()2+1;
(2)﹣14﹣|0.5|×[﹣2﹣(﹣3)3].
20.计算下列各题:
(1)(﹣+)×2×32﹣÷(﹣1.75);
(2)﹣14﹣(1﹣0×4)÷×[(﹣2)2﹣6].
参考答案
1.解:(1)5+(﹣6)+3﹣(﹣4)
=5+(﹣6)+3+4
=(5+3+4)+(﹣6)
=12+(﹣6)
=6;
(2)﹣23÷×(﹣)2
=﹣8××
=﹣8.
2.解:(1)原式=﹣48×(﹣)+(﹣48)×+(﹣48)×
=8﹣36+2
=10﹣36
=﹣26;
(2)原式=﹣1﹣(2﹣9)
=﹣1﹣×(﹣7)
=﹣1+
=.
3.解:(1)
=﹣9×2﹣1×(﹣8)
=﹣18+8
=﹣10;
(2)
=(﹣+)×36
=×36﹣×36+×36
=27﹣14+16
=29.
4.解:(1)原式=﹣4﹣7+3﹣1
=﹣11+3﹣1
=﹣8﹣1
=﹣9;
(2)原式=÷(﹣)2÷36÷
=÷()2÷36÷
=÷÷36÷
=×36××4
=.
5.解:(1)原式=﹣5+6﹣7+4
=﹣2;
(2)原式=﹣1﹣18×﹣(﹣2)
=﹣1﹣4+2
=﹣3.
6.(1)解:﹣9﹣16+12﹣15
=﹣28.
(2)解:
=4+4﹣8
=0.
7.解:(1)
=
=
=
=;
(2)
=
=
=
=
=.
8.解:(1)
=1.5﹣(﹣4.25)+3.75﹣8.5
=1.5﹣8.5+(4.25+3.75)
=﹣7+8
=1.
(2)
=
=25×1
=25.
9.解:(1)原式=﹣1+6+2+1
=8;
(2)原式=
=3+3﹣8
=﹣2.
10.解:(1)原式=﹣2+﹣
=﹣+﹣
=﹣﹣
=﹣
=﹣8;
(2)原式=﹣1+9×﹣16÷16
=﹣1+1﹣1
=﹣1.
11.解:(1)
=﹣8×(﹣+﹣)×6
=﹣48×(﹣+﹣)
=﹣48×(﹣)﹣48×﹣48×(﹣)
=8﹣36+4
=﹣24;
(2)
=﹣1﹣[2﹣(﹣8)]×(﹣)×
=﹣1﹣10×(﹣)×
=﹣1+
=.
12.解:
=
=2﹣2﹣1
=﹣1.
13.解:(1)原式=12+6﹣9
=18﹣9
=9;
(2)原式=﹣9÷4××6+(﹣8)
=﹣××6﹣8
=﹣18﹣8
=﹣26.
14.解:(1)原式=﹣1﹣3+3=﹣1;
(2)原式=
=
=﹣18﹣8
=﹣26.
15.解:(1)﹣23﹣(1+0.5)×÷(﹣1)
=﹣8﹣×÷(﹣)
=﹣8+
=﹣7
(2)
=(100﹣)×(﹣17)
=100×(﹣17)﹣×(﹣17)
=﹣1700+6
=﹣1694.
16.解:(1)原式=﹣1+5﹣3=1;
(2)原式=﹣4﹣[4﹣(﹣8)]=﹣4﹣12=﹣16.
17.解:(1)原式=﹣1﹣×
=﹣1﹣﹣4
=﹣5;
(2)原式=﹣64+3×4﹣6+
=﹣64+12﹣6+
=﹣57.
18.解:(1)原式=﹣264﹣25
=﹣289;
(2)原式=﹣4÷×+(9﹣×36+×36﹣×36)
=﹣4××+9﹣28+33﹣6
=﹣+9﹣28+33﹣6
=﹣.
19.解:(1)﹣23÷()×()2+1
=﹣8÷(﹣)×﹣+1
=﹣8×(﹣)×+1
=+1
=1;
(2)﹣14﹣|0.5|×[﹣2﹣(﹣3)3]
=﹣1﹣×3×(﹣2+27)
=﹣1﹣×3×25
=﹣1﹣
=.
20.解:(1)(﹣+)×2×32﹣÷(﹣1.75)
=(﹣+)×(2×9)﹣×(﹣)
=(﹣+)×18+1
=×18﹣×18+×18+1
=14﹣15+7+1
=7;
(2)﹣14﹣(1﹣0×4)÷×[(﹣2)2﹣6]
=﹣1﹣(1﹣0)×3×(4﹣6)
=﹣1﹣1×3×(﹣2)
=﹣1+6
=5.