300×5= 2400÷3= 15×3= 804÷4= 9×500=
40×8= 20×7= 20÷5= 90÷3= 64÷2=
149+111= 700÷7= 40+30= 90×9= 23×3=
400÷4= 50×4= 102×4= 500÷5= 800÷4=
300×5= 2400÷3= 15×3= 804÷4= 9×500=
40×8= 20×7= 20÷5= 90÷3= 64÷2=
149+111= 700÷7= 40+30= 90×9= 23×3=
400÷4= 50×4= 102×4= 500÷5= 800÷4=
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减去
所得的差与
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