四年级口算题1000道(202**********).doc

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I. 45+15 X 6= 135
- 5X 8=400 X 5 - 2X 4=60
X 3+8=98
- 4+20 X 5= 200 +12 - 3+20=34 7.(80 - 20+80) - 4=21 +(100-10 X 5)=120
- 40= 9
X 20= 800
II. 80-25= 55 +45=115
X 2= 180
X 6= 96
X 6= 1800
- 9=60
X 20= 600
- 4= 100
- 80= 270 +70=230
- 64 - 8= 10 - 6+20=27
- 5 X 7= 5 +60 - 3=100
+ 18 - 2= 50
- 11 X 5= 20 +7-29= 20
- 80=70
X 16= 400
X 25= 3000
X 11= 396
- 25=41 +70= 406
X 9X 4= 900
- 33 X 3= 101
- 1010=2010
X 50= 600
X 8= 200
X 11= 253
- 25=5
- 2200=2000 +80= 300
X 8X 5= 800
- 3 X 200=0 +20 - 2= 30
- 25 - 5= 30 +8-40= 4
- 40=70
- 14 = 7
- 24 = 4
- 14 =4
- 13 = 5
- 15 = 5
- 24 =5
- 25 = 8
- 16 = 50
- 21 =40
- 14 = 40
- 13 = 30
- 15 =40
- 24 = 3
- 17 = 5
- 15 =6
- 16 = 6
- 26 = 4
- 17 =3
- 40 = 2
- 20 = 5
- 4 =25
- 40 = 6
- 4 = 230
- 60=5
-
-4 =
=16
-
-5 =10