4÷4= 7.2÷1.8= 0.7÷0.35= 0.72÷1.44= 查看更多

 

题目列表(包括答案和解析)

0.56÷0.04= 1.44÷2= 24.6÷0.6= 4.5÷0.15=
0.63÷0.09= 12.84÷1.2= 3.9÷0.13= 1.6÷1.6=
20÷0.25= 1.3÷2.5= 100÷12.5= 7.8÷0.13=
3.24÷0.8= 13×1.1= 5.46÷3= 4.07×3=
5.28t-1.99t= 0.6+89= 5.7×0.1= 1.6÷0.4=
6÷0.3= 5÷0.25= 0.45×3= 0.35×8=
7.1-0.76= 1.2×0.3= 0.76÷4= 1.9×0.8=
4.2-2.8= 7.2÷1.6= 19.8+3.2= 18-17.45=
4.5+1.5= 0.75x+0.25x= 2.5×4= 0.46÷2=
0.7×1.4= 1-0.92= 8×0.125= 3.4÷20=
10a-1.8a= 4.8×0.2= 0.3÷0.15= 0.15÷2=
0.2×0.5= 2.2-1.8= 3.1+1.75= 32.8+1.9=
0.42×0.5= 0.76+1.24= 3.06-0.72= 0.51÷17=
5.2÷13= 8.2×0.01= 1.72-0.73= 1.6×0.4=
4.8b+3.2b= 2.5×4= 0.3×101= 1.2×0.5=

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0.56÷0.04=1.44÷2=24.6÷0.6=4.5÷0.15=
0.63÷0.09=12.84÷1.2=3.9÷0.13=1.6÷1.6=
20÷0.25=1.3÷2.5=100÷12.5=7.8÷0.13=
3.24÷0.8=13×1.1=5.46÷3=4.07×3=
5.28t-1.99t=0.6+89=5.7×0.1=1.6÷0.4=
6÷0.3=5÷0.25=0.45×3=0.35×8=
7.1-0.76=1.2×0.3=0.76÷4=1.9×0.8=
4.2-2.8=7.2÷1.6=19.8+3.2=18-17.45=
4.5+1.5=0.75x+0.25x=2.5×4=0.46÷2=
0.7×1.4=1-0.92=8×0.125=3.4÷20=
10a-1.8a=4.8×0.2=0.3÷0.15=0.15÷2=
0.2×0.5=2.2-1.8=3.1+1.75=32.8+1.9=
0.42×0.5=0.76+1.24=3.06-0.72=0.51÷17=
5.2÷13=8.2×0.01=1.72-0.73=1.6×0.4=
4.8b+3.2b=2.5×4=0.3×101=1.2×0.5=

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仔细观察,选择合适的方法计算.
(1)63+24+37 (2)65+42+44 (3)18+36+72 (4)78+15+85 (5)28+34+66
(6)35+44+56 (7)232-48-52 (8)318-63-37 (9)427-39-27 (10)385-(78+85)
(11)63-9-9-9 (12)500-97-98-99 (13)700-101-102 (14)351-(151+56) (15)49+49+49+49
(16)72+54+28+45 (17)1+2+3+4+5+6+7 (18)6+17+18+19 (19)0+2+4+6+8+10+12 (20)3+6+9+12+15+18+21.

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仔细观察,选择合适的方法计算.
(1)63+24+37(2)65+42+44(3)18+36+72(4)78+15+85(5)28+34+66
(6)35+44+56(7)232-48-52(8)318-63-37(9)427-39-27(10)385-(78+85)
(11)63-9-9-9(12)500-97-98-99(13)700-101-102(14)351-(151+56)(15)49+49+49+49
(16)72+54+28+45(17)1+2+3+4+5+6+7(18)6+17+18+19(19)0+2+4+6+8+10+12(20)3+6+9+12+15+18+21.

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口算
(1)70×80=
5600
5600
        3.7×0.5=
1.85
1.85
     3.2×100=
320
320
      8.9-3.8=
5.1
5.1

(2)3.8+2.5+6.2=
12.5
12.5
    12-6.2-3.8=
2
2
   1.7+0.43+3.3=
5.43
5.43
    3.4-1.5-0.5=
1.4
1.4

(3)
8
9
+
1
9
--
2
7
=
5
7
5
7
     1.4×5=
7
7
    650-470=
180
180
    79+2.1=
81.1
81.1
    
(4)3.14×3=
9.42
9.42
      6.7+3.4=
10.1
10.1
   2.01×0.4=
0.804
0.804
   
6
13
+
7
13
=
1
1

(5)3.99+5.2=
9.19
9.19
   23+6.68=
29.68
29.68
   7×0.08=
0.56
0.56
    0.25×0.4=
0.1
0.1

(6)22×0.2=
4.4
4.4
   99.9+1=
100.9
100.9
   0.72÷6=
0.12
0.12
   3.9÷1.3=
3
3

(7)0.8×0.8=
0.64
0.64
   5.88+3.12=
9
9
   1.9+2.1=
4
4
   26÷2.6=
10
10
  
(8)340÷17=
20
20
   9.3÷0.3=
31
31
  13×4=
52
52
   3.6×5=
18
18

(9)1.5×4=
6
6
   20×16=
320
320
   28×3=
84
84
   3.2÷4=
0.8
0.8
 
(10)0.28×100=
28
28
   3200÷1000=
3.2
3.2
   0.5×100=
50
50
   4×0.125=
0.5
0.5

(11)340+120=
460
460
    
1
4
+
1
2
=
3
4
3
4
   2.5÷5=
0.5
0.5
   4.95×10=
49.5
49.5
   
(12)12-
1
2
-
1
2
=
11
11
   1÷0.25=
4
4
  5×0.13=
0.65
0.65
   12×0.05=
0.6
0.6

(13)3.08÷0.1=
30.8
30.8
   0.35×6=
2.1
2.1
   25÷0.5=
50
50
   1.5×3=
4.5
4.5

(14)4.3-2.7=
1.6
1.6
   8.1÷0.9=
9
9
   12÷1.2=
10
10
   0.48÷6=
0.08
0.08

(15)2.6÷26=
0.1
0.1
  0.72×5=
3.6
3.6
     4.8+3.2=
8
8
   5.7÷0.3=
19
19

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